for the build up of the tray... i wanted the tray to still be removeable in the event of a catastrophic failure. so to start i layed a sheet of glass on a piece of wax paper over a sheet of plywood. this gave me one thin layer that i 5200 down to the top of the pump cavity. this gave me an area to atach my layup to but it could still be pryed up just like the original stock tray.
next i cut strips out of the old tray and made trusses that go from the pump cavity to the step on the bondrail. the trusses will give som extra strength under the foot area and als give a starting point for the initial layup.