Ok as i said its .Tap to run artcam to so3 when i started my test model i did choose mm not inches but im sure you can choose either just be sure to use (Gcode Arcs .tap) and pick mm or inches what ever you started the model in,If you make a project in mm you want the Gcode Arcs (mm) .tap as pictured.If you started your project/model in inches you want to pick Gcode Arcs (inches) .tap …Hope this helps, it does work and there isnt a need to spend $75 for so3 users.Really not sure what other info i can provide about it but if you still cant figure it out just contact me 
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