re: Planer Table/Cabinet

The 2-3" variables I don’t know. One thing I’d suggest on your cabinet is an inset back of 3/4 ply to square it up. In fact, on such a large cabinet, full legs with inset panels may be the way to go. It’s a structural change, I know, but a leg frame and panels are certain to be stronger than any form of corner joints in plywood. Short of that, an inset back and an inset face frame may be enough. Just my opinion, and as I said, my own cabinet did not cut the mustard over time!