Instead, I am trying this out: foam formed to fit and attached with two sided tape.
I cut the foam to the basic shape, and then fine tunes by sanding. As the two sided tape is about 1/16" thick, I sanded the foam down, bit by bit, added the two sided tape to the tray side, then sanded more. Below are photos of the underside of the tray with the two pieces of foam just set in.
I will let you guys know if this works out.


