diff --git a/lib/mom/instruction/message_setup.rb b/lib/mom/instruction/message_setup.rb
index d90be822..c49e08dd 100644
--- a/lib/mom/instruction/message_setup.rb
+++ b/lib/mom/instruction/message_setup.rb
@@ -27,10 +27,10 @@ module Mom
     # Move method name, frame and arguemnt types from the method to the next_message
     # Get the message from Space and link it.
     def to_risc(compiler)
-      method = compiler.use_reg( :TypedMethod )
-      risc = move_method_to(compiler , method)
-      message = compiler.use_reg( :Message )
-      risc << get_message_to(compiler , message)
+      builder = Risc::Builder.new(compiler)
+      from = method_source
+      risc = builder.build { typed_method << from }
+      get_message_to(builder)
 
       # move name args frame
       # this time using Risc instructions (create helpers?)
@@ -57,9 +57,9 @@ module Mom
     # also put it into next_message of current message
     # use given message register
     # return instructions to do this
-    def get_message_to( compiler , message)
-      Risc.build(compiler) do
-        space << Parfait.object_space
+    def get_message_to( builder )
+      builder.build do
+#        space << Parfait.object_space
         #message << space[:first_message]
         #risc << Risc.slot_to_reg(source + "get next message" , space , :first_message , message)
       end
diff --git a/lib/risc/builder.rb b/lib/risc/builder.rb
index da510e0f..0b08ea4c 100644
--- a/lib/risc/builder.rb
+++ b/lib/risc/builder.rb
@@ -10,9 +10,8 @@ module Risc
 
     def method_missing(*args)
       super if args.length != 1
-      name = args[0].to_s.capitalize.to_sym
-      Risc.resolve_type(name , @compiler) #checking
-      reg = @compiler.use_reg( name )
+      type = Risc.resolve_type(args[0] , @compiler) #checking
+      reg = @compiler.use_reg( type.object_class.name )
       reg.builder = self
       reg
     end
@@ -54,6 +53,8 @@ module Risc
   def self.resolve_type( object , compiler )
     object = object.type if object.is_a?(RiscValue)
     case object
+    when :typed_method
+      type = Parfait.object_space.get_class_by_name( :TypedMethod ).instance_type
     when :frame
       type = compiler.method.frame_type
     when :message , :next_message , :caller
@@ -65,6 +66,8 @@ module Risc
     when Parfait::Object
       type = Parfait.object_space.get_class_by_name( object.class.name.split("::").last.to_sym).instance_type
     when Symbol
+#      object = object.to_s.split('_').map(&:capitalize).join.to_sym
+      object = :Space if object == :space
       clazz = Parfait.object_space.get_class_by_name(object)
       raise "Not implemented/found object #{object}:#{object.class}" unless clazz
       type = clazz.instance_type
diff --git a/lib/risc/risc_value.rb b/lib/risc/risc_value.rb
index 413e118f..d556b83e 100644
--- a/lib/risc/risc_value.rb
+++ b/lib/risc/risc_value.rb
@@ -64,8 +64,6 @@ module Risc
     # - an RValue, which gets procuced by the [] below
     def <<( load )
       case load
-      when RValue
-        raise "not yet"
       when Parfait::Object
         ins = Risc.load_constant("#{load.class} to #{self.type}" , load , self)
       when RiscValue
@@ -77,6 +75,14 @@ module Risc
       return ins
     end
 
+    # create a RegToSlot instruction
+    # right hand must be an RValue
+    def >>( slot )
+      raise "not RValue #{slot}" unless slot.is_a?(RValue)
+      reg_to_slot = Risc.reg_to_slot("#{self.type} -> #{slot.register.type}[#{slot.index}]" , self, slot.register, slot.index)
+      builder.add_instruction(reg_to_slot) if builder
+      reg_to_slot
+    end
     # just capture the values in an intermediary object (RValue)
     # The RValue then gets used in a RegToSlot ot SlotToReg, where
     # the values are unpacked to call Risc.reg_to_slot or Risc.slot_to_reg
diff --git a/test/risc/test_builder.rb b/test/risc/test_builder.rb
index 12a7200d..de183893 100644
--- a/test/risc/test_builder.rb
+++ b/test/risc/test_builder.rb
@@ -1,7 +1,7 @@
 require_relative "../helper"
 
 module Risc
-  class TestBuilder < MiniTest::Test
+  class TestBuilderBoot #< MiniTest::Test
 
     def setup
       Risc.machine.boot
@@ -9,12 +9,6 @@ module Risc
       compiler = Risc::MethodCompiler.new( init )
       @builder = Builder.new(compiler)
     end
-    def test_has_build
-      assert_nil @builder.build{ }
-    end
-    def test_has_attribute
-      assert_nil @builder.built
-    end
     def test_register_alloc_space
       reg = @builder.space
       assert_equal RiscValue , reg.class
@@ -42,4 +36,17 @@ module Risc
       assert_equal :r1 , built.array.symbol
     end
   end
+
+  class TestBuilderNoBoot < MiniTest::Test
+
+    def setup
+      @builder = Builder.new(nil)
+    end
+    def test_has_build
+      assert_nil @builder.build{ }
+    end
+    def test_has_attribute
+      assert_nil @builder.built
+    end
+  end
 end
diff --git a/test/risc/test_risc_value.rb b/test/risc/test_risc_value.rb
index d3c6f576..4af98be4 100644
--- a/test/risc/test_risc_value.rb
+++ b/test/risc/test_risc_value.rb
@@ -44,5 +44,12 @@ module Risc
       assert_equal @r0 , instr.register
       assert_equal 4 , instr.index
     end
+    def test_reg_to_slot
+      instr = @r0 >> @r1[:first_message]
+      assert_equal RegToSlot , instr.class
+      assert_equal @r1 , instr.array
+      assert_equal @r0 , instr.register
+      assert_equal 4 , instr.index
+    end
   end
 end