I used Dual-Lock as it's way stronger. There's just a little piece on all four rubber feet. It's pretty sturdy, I can pick the board up by the FM-3 handles, but you can feel it starting to pull loose. I may take the sides off and put it directly on the FM-3, havent got that far, yet. Trying to decide if I want to try to squeeze a Morningstar controller on there or just get a FC-6 and move up to a Pedaltrain Classic 2 I have laying around. Really want to keep it small, though.
Does anyone know how much (if any) taking the sides off reduces the total width? The Morningstar is going to be really tight as it sits now.