Jim,
I created the 3-d image in Enroute and then sliced it into 3" thick slices that I could manage on my table. I then glued the slices together and finished with some hand tools. I wish I had a taller gantry for doing thicker material, mine is only 6.5". The trade off though is that the taller you go the more you lose rigidity and accuracy, at least according to MultiCam.
Paul
Universal PLS 6.120D 75 watt
MutiCam Apex CNC 4'x8' w 6 bit TC.
EnrRoute 6 Pro 3d software.
Vision 2550 Rotary Engraver.