I thought it might be useful, here is my G code I have written for a 6.35mm mill. When I load the text file into CM it tells me the code is unsupported but I thought with CM 1.1 this should work?
G21
G38.2 X-12.7F30
G92 X34.175
G91 G0 X12.7
G91 G0 Y25.4
G91 G0 X-25.4
G38.2 Y-25.4 F30
G92 Y34.175
G91 G0 Y03.175
G91 G0 Z11.35
G91 G0 Y- 15.875
G38.2 Z-25.4 F30
G92 Z5
G91 G0 Z3.175
G91 G0 Y25.4 X25.4