Great piece Dick-
You mentioned in your post:
I ordered the diamond ribbon strip mahogany top, laid up on 3/4" mdf.
I assume by ordered you meant you put in order the veneer pattern-or did you literally order the top from another source?
and back to the edgebanding protocol-did you put that solid (2"?) edge on the torsion box first-then set the top and trim?
Problem solving -Expert Level!