[whatsgolden]

It looks like you've got quite a bit of good info here, so this may or may not be helpful. I built my own table about 4 or 5 months ago. I used yoga mats for the padding under my playing surface. They come 24" wide, so I used two of them, and taped them together with electrical tape.

Many of my friends built their own table as well and used a variety of foams & pads under their felt, but none offer the same bounce as mine. I couldn't be happier with how it turned out.