diff --git a/app/assets/images/slides/at_work.jpg b/app/assets/images/slides/at_work.jpg
new file mode 100644
index 0000000..8480971
Binary files /dev/null and b/app/assets/images/slides/at_work.jpg differ
diff --git a/app/views/pages/arm/qemu.html.haml b/app/views/pages/arm/qemu.html.haml
index 47871aa..5697b8a 100644
--- a/app/views/pages/arm/qemu.html.haml
+++ b/app/views/pages/arm/qemu.html.haml
@@ -44,7 +44,7 @@
 
 %p
   Get the latest Raspian image. Currently (2019) the
-  =ext_link "buster lite version" "https://www.raspberrypi.org/downloads/raspbian/"
+  =ext_link "buster lite version" , "https://www.raspberrypi.org/downloads/raspbian/"
   without Gui is fine, and smaller.
 %p
   Change the file format with something like:
diff --git a/app/views/slides/minsk/_how.haml b/app/views/slides/minsk/_how.haml
index fe5f5ce..e949d27 100644
--- a/app/views/slides/minsk/_how.haml
+++ b/app/views/slides/minsk/_how.haml
@@ -20,12 +20,12 @@
   %br
   %h3.fragment compiler compiles methods
   %br
-  %h4.fragment controller = compiler part
+  %h4.fragment controller = compiler
 
 %section#http
   %h3 rack handles http
   %br
-  %h3.fragment assembler and elf handles binary creation
+  %h3.fragment assembler binary creation
   %br
   %h4.fragment lower levels don't matter to most
 
@@ -36,77 +36,77 @@
   %br
   %h4.fragment same same, but different :-)
 
-%section#compiler_layers
-  %h2 Compiler layers
-  %p Ruby source (parser gem)
-  %p.fragment Virtual oo language (vool)
-  %p.fragment Minimal oo Machine (mom)
-  %p.fragment Risc abstraction
-  %p.fragment Target (arm)
-  %p.fragment Elf / binary
-
-%section#vool
-  %h2 Vool, virtual oo language
-  %p virtual == no syntax
-  %p.fragment oo == object model like ruby
-  %p.fragment ruby without the fluff ( splats / unless ..)
-  %p.fragment Statements + Expression
-  %p.fragment nothing implicit
-
-%section#machines
-  %h2 Language vs Machine
-  %p next level is (abtract) machine
-  %p.fragment statement tree vs instruction list
-  %p.fragment variables vs memory
-  %p.fragment control structures vs jumps
-  %p.fragment abstract vs basic
-
-%section#mom
-  %section#mom1
-    %h2 Mom, minimal object machine
-    %p 16 instructions
-    %p.fragment Works only on memory
-    %p.fragment higher level than next
-    %p.fragment ease transition to next level
-    %p.fragment 1 vool → 2-8 mom
-
-  %section#mom2
-    %h2 MOM instructions
-    %p simple call , argument transfer , return sequence
-    %p.fragment dynamic call , method resolve
-    %p.fragment checks with implicit jumps
-    %p.fragment ruby truth check , identity check
-    %p.fragment yield . . .
 %section
-  %section#risc1
-    %h2 Risc abstraction
-    %p arm without the fluff
-    %p.fragment arm like registers
-    %p.fragment 20 instructions
-    %p.fragment extensible (for builtin + more)
-    %p.fragment last virtual layer
-    %p.fragment interpreter + visual debugger
+  %section#compiler_layers
+    %h2 Compiler layers
+    %p Ruby source (parser gem)
+    %p.fragment Simple Object Language
+    %p.fragment SlotMachine
+    %p.fragment Risc abstraction
+    %p.fragment Target (arm)
+    %p.fragment Elf / binary
 
-  %section#risc2
-    %h2 Risc instructions
-    %p mem/reg + reg/reg
-    %p.fragment arithmetic operators
-    %p.fragment tests on operation result
-    %p.fragment jump , call , return
-    %p.fragment syscall
+  %section#sol
+    %h2 Sol, Simple Object language
+    %p simple, ruby without the fluff ( splats / unless ..)
+    %p object model like ruby
+    %p Statements + Expression
+    %p nothing implicit
+
+  %section#machines
+    %h2 Language vs Machine
+    %p next level is (abtract) machine
+    %p.fragment statement tree vs instruction list
+    %p.fragment variables vs memory
+    %p.fragment control structures vs jumps
+    %p.fragment abstract vs basic
+
+  %section#mom
+    %section#mom1
+      %h2 SlotMachine
+      %p 16 instructions
+      %p.fragment Works only on memory
+      %p.fragment higher level than next
+      %p.fragment ease transition to next level
+      %p.fragment 1 Sol → 2-8 slot
+
+    %section#mom2
+      %h2 SlotMachine instructions
+      %p simple call , argument transfer , return sequence
+      %p.fragment dynamic call , method resolve
+      %p.fragment checks with implicit jumps
+      %p.fragment ruby truth check , identity check
+      %p.fragment yield . . .
+  %section
+    %section#risc1
+      %h2 Risc abstraction
+      %p arm without the fluff
+      %p.fragment arm like registers
+      %p.fragment 20 instructions
+      %p.fragment extensible (for builtin + more)
+      %p.fragment last virtual layer
+      %p.fragment interpreter + visual debugger
+
+    %section#risc2
+      %h2 Risc instructions
+      %p mem/reg + reg/reg
+      %p.fragment arithmetic operators
+      %p.fragment tests on operation result
+      %p.fragment jump , call , return
+      %p.fragment syscall
 
 %section#code
   %h2 Code generation
   %br
   %br
-  %h2.fragment object generation
+  %h2.fragment Object generation
 
 %section#model
   %h2 Object Model
   %p Everything is Object
   %p.fragment Fixed sizes
   %p.fragment opaque data, ruby has no access
-  %p.fragment mom instructions to process data
+  %p.fragment slot instructions to process data
 
 %section#types
   %h2 Object has Type
@@ -138,22 +138,6 @@
   %p.fragment Utils: String, Integer , Array , Hash
   %p.fragment  also, additional builtin methods
 
-%section#calling
-  %h2 Calling convention
-  %p linked list (not stack)
-  %p.fragment object oriented
-  %p.fragment easy to understand
-  %p.fragment exceptions easier
-  %p.fragment binding easier
-
-%section#message
-  %h2 Message Object
-  %p next / caller message
-  %p.fragment frame (locals) + args
-  %p.fragment return address + value
-  %p.fragment method
-  %p.fragment receiver (self)
-
 %section#project
   %h2 Project
   %p 5 years
diff --git a/app/views/slides/minsk/_intro.haml b/app/views/slides/minsk/_intro.haml
index 2621c72..9651345 100644
--- a/app/views/slides/minsk/_intro.haml
+++ b/app/views/slides/minsk/_intro.haml
@@ -61,7 +61,7 @@
     Woodwork
     %small (2010 ecoframe)
   %p
-    %img{:alt => "Villa Taika", "data-src" => image_url("slides/grillrb/villataika.jpg") , height: 400}/
+    %img{:alt => "At Work", "data-src" => image_url("slides/at_work.jpg") , height: 400}/
 
 %section#smallalk
   %h2 1995: Smalltalk
@@ -75,19 +75,8 @@
   %p In memory db
   %p core judy (C), rest ruby
   %p super performance, until used from rails
-  %h3 Ruby has performance issues
+  %h3 MRI has performance issues
 
-%section#pi
-  %h2 2013: PI
-  %p pi becomes an arduino
-  %p.fragment laptop  becomes a pi
-  %p.fragment
-    Speed problem
-    %b 10x
-    possibly
-    %b 30x
-    sometimes
-    %b 100x
 %section#start
   %h2 2013: PI
   %p pi becomes an arduino
@@ -100,25 +89,43 @@
     sometimes
     %b 100x
 %section#start2
-  %p Start 2014 at Frozen ruby
+  %p Start 2014 at Frozen rails
   %p.fragment started vm mindset
   %p.fragment main descisions
   %p.fragment good progress
+
+%section#descision
+  %h2 Early descisions
+  %p OO calling
+  %p memory design: cache size
+  %p kernel calling
+  %p microkernel
+
 %section#no_vm
   %h2 Beginning
   %p learn arm
   %p check llvm and others
   %p 6 classes assembler
   %p 3 classes binary creation
-  %p binaries easy, 1 month
+  %p static binaries easy, 1 month
 %section#calling
   %h2 Calling convention
   %p
     C or
     %span.red  no C
   %p object oriented
-  %p named fields
+  %p named fields / instance vars
   %p simple, not too slow
+  %p
+    kernel calling much simpler:
+    %span.red  no libc
+
+%section#control
+  %h2 Control Structures
+  %p if / while / return
+  %p risc / meta arm
+  %p straight to risc
+  %p relatively easy
 
 %section#sending
   %h2 Dynamic calling
@@ -126,7 +133,7 @@
   %p many failed ideas
   %p "years" of trying
   %h3 decent layers
-  
+
 %section#demo
   %h2
     Demo of
diff --git a/app/views/slides/minsk/_next.haml b/app/views/slides/minsk/_next.haml
index 1aec9f4..0fe9cf5 100644
--- a/app/views/slides/minsk/_next.haml
+++ b/app/views/slides/minsk/_next.haml
@@ -1,8 +1,3 @@
-%section#next
-  %h2 Plans for RubyX
-  %h2 What can you do
-  %h2 Impact on community
-
 %section#next
   %h2 My next Plans
   %p Benchmarks
@@ -12,37 +7,38 @@
 %section#bench
   %h2 Benchmarks
   %p Micro with mixed results
-  %p.fragment Integer ops slightly slower
-  %p.fragment Calling 2x faster
-  %p.fragment Puts faster than c
+  %p Integer ops slightly slower
+  %p Calling 2x slower
+  %p Puts faster than C
 
 %section#bench_conclusion
   %h2 Conclusion from Benchmarks
   %p Bigger benchmarks, more functionality
-  %p.fragment Profiling
-  %p.fragment Macros
-  %p.fragment Inlining
+  %p Profiling
+  %p Macros / better design
+  %p Inlining
 
 %section#better_parf
   %h2 Better Parfait
   %p Integrate existing tests
-  %p.fragment Complement existing classes
-  %p.fragment More classes
-  %p.fragment Optimize
-
-%section#better_parf
-  %h2 Bootstrap
-  %p Compile ruby-x with rubyxc
-  %p.fragment Improving compiler
-  %p.fragment Figure out metacode
-  %p.fragment Integrate ruby spec
+  %p Complement existing classes
+  %p More classes
+  %p Optimize
 
 %section#you
   %h2 Things you can do
   %p Spread the word
-  %p Learn
+  %p Try / learn
   %p Participate
 
+%section#try
+  %h2 Try
+  %p clone https://github.com/ruby-x/rubyx
+  %p bundle
+  %p ruby test/test_all.rb
+  %p ./bin/rubyxc compile/interpret/execute
+  %p compile test/mains/source/10_add__4.rb
+
 %section#participate
   %h2 Participate
   %p Many topics, small and large
@@ -50,12 +46,19 @@
   %p.fragment no pressure
 
 %section#topics
-  %h2 Topics
-  %p.fragment assemblers (architectures)
-  %p.fragment Register allocation
-  %p.fragment digital trees (judy)
-  %p.fragment lock free synchronisation (Dr Cliff)
-  %p.fragment stdlib , pi project , gc , . . . . .
+  %h2 Topics, easy
+  %p String methods
+  %p.fragment other Parfait
+  %p.fragment negative tests
+  %p.fragment error handling
+
+%section#topics
+  %h2 Topics, medium
+  %p break / next
+  %p.fragment switch
+  %p.fragment assembler (eg intel)
+  %p.fragment stdlib (File ?)
+  %p.fragment exception
 
 %section#community
   %h2 Impact on community
@@ -71,3 +74,10 @@
   %p.fragment better gc, better hash
   %p.fragment good thrive etc
   %p.fragment best results when not controlled
+
+%section#community2
+  %h2 Community's ruby
+  %p For and BY the community
+  %p.fragment very pro open source
+  %p.fragment democratic open source
+  %p.fragment everybody must be heard
diff --git a/app/views/slides/minsk/_what.haml b/app/views/slides/minsk/_what.haml
index de75dd9..1f8c78a 100644
--- a/app/views/slides/minsk/_what.haml
+++ b/app/views/slides/minsk/_what.haml
@@ -3,9 +3,16 @@
     Currenty working
     %small (overview)
   %p basic oo (classes/ objects)
-  %p.fragment memory layout
-  %p.fragment calling convention
-  %p.fragment binary creation
+  %p memory layout
+  %p calling convention
+  %p binary creation
+
+%section#control
+  %h3 control structures
+  %p if / else / until
+  %p while
+  %p complex conditions
+  %p no break / continue (easy)
 
 %section#vars
   %h3 variables +
@@ -25,8 +32,8 @@
 %section#dynamic
   %h2 dynamic sending
   %p  as static, plus
-  %p.fragment method resolution
-  %p.fragment caching
+  %p method resolution
+  %p caching
 
 %section#lambdas
   %h3 Lambdas
@@ -35,19 +42,12 @@
   %p  yield with arguments
   %p return (lambda style)
 
-%section#control
-  %h3 control structures
-  %p if / else / until
-  %p while
-  %p complex conditions
-  %p no break / continue (easy)
-
 %section#not
   %h2 Not working
-  %p eval
-  %p procs / binding
+  %p global variables
+  %p multi assignment
   %p exceptions
-  %p class variables / globals
-  %p multi - assignment
+  %p procs / binding
   %p stdlib
+  %p eval
   %p   . . . . . .