I have the Incra master lift 3/8" aluminum plate. Never take my makita router out of it and it has never sagged. Never heard of a 3/8" aluminum plate sagging. I am building my own table. The top is made of 1 1/2" MDF with laminate top and bottom. Under this I built a cross brace frame out of 3/4" x 2" oak cross braced at a min of every 10". Extra cross braceing around the router and mounting plate. Yes EVERYTHING I build is over built. The cabinet which is not done yet is very heavy duty as well. With my router the top and cabinet less drawers and not quite all the sheeting it weights in at about 100 pounds. The top and cabinet is fairly large at 32"x48"