Matthew, You can adjust tolerance in VCarve Pro easily enough. When you cut your pockets, there is a "pocket allowance" in the toolpath selection. TJ usually uses ply and I believe uses .01-.02" usually, Unless the piece is designed for a slip fit to be taken apart regularly. Use calipers for thickness of ACTUAL wood every time. Maybe cut tenons first so you can test check fit before removing your mortices from the machine, as it's easy to go a "smidge " more if you need to while it still fastened down. Once it's off--all bets are off.
scott P.
2013 Desktop/spindle/VCP 11.5**
Maine