Ended up buying another CAM program because have not been able to properly mill any of my 3D models in CamBam - it's most likely possible - but not for me yet. Estlcam you just bring your model in, enter a few parameters, hit a couple buttons and your all set. That said, I paid for CamBam and hope I can figure it out. 2D or dxf. files no problem - but the 3D isn't happening. Andy said he help me out but he has been pretty busy - and I totally understand running a business so I'm not going to e-mail him again. Estlcam seems to be working out fine.