Had to put a new top on my bench because it was flexing when I used my new Loadmaster press. Bought a nice piece of Oak veneered plywood and put 3 coats of Lindseed oil on it. I wanted to seal it so it wouldn't stain. Now it looks like furniture. The front 14" of the frame top are solid 2x4's for added support to the top.
I keep my powders and extra shells in here...
I recessed the Loadmaster and mounted it with 3.5" lag bolts.
Like most things, it's a work in progress.