This video shows you how to set defaults in MasterCAM, so you don’t need to enter them each time you work with it.
See the PDF below for recommended settings for MasterCAM:
Build the object shown below. The Rhino file available here has curves you can use as a reference to build with / from.
http://3d2018.christopherspecce.com/wp-content/uploads/2018/04/Y-Branch-Challenge2017.zip