You just purchased X4 , really how is that as no one is selling X4 as Mastercam is at X6. Sorry you do not like it it. but for designing and making guitars X series of MC sure made it easier as I started doing it in V9 and it was allot harder for sure.
PS Rhino is not a Cad-Cam software it is a Cad software.
Just a couple of thoughts for you.