Nice quickie build. I particularly like the double T slots and the handles for locking the fence down. The trusses underneath are a good idea too, light and will really help keep it flat. You could scale this up pretty easily and put it on a cabinet. I always prefer a mounting plate, and to facilitate that, I'd make the 3/4 the bottom layer an inch smaller than the plate, then cut the half inch top to fit the plate and install some blunted tip screws as levelers. Glad you posted this. Looks like an item to share with noobies because it is so simple, yet robust.
The more I do, the less I accomplish.