Dannie,
My self interest is to make a couple of these on which to sit my newly finished N3Ss. I hope to post photos soon.
If the footprint was increased to the same as the N3Ss 8" X 10.65", an extra 1.5" wide, what kind of effect would this have on the OB VS. Ported issue and the bottoming out of the woofers?
If the above is not enough to eliminate the problem, how about a wedge with the front width 8" and the rear width 10"-12".
Best,
Steven