In the very early stages of starting benchwork. I've been pondering roadbed material and decided to use Homasote. I used this on my last Albemarle Division and liked it, so I'll go with it again. On my last layout I used 3/4" plywood and it was like a tank. I am considering using 5/8". On the first Albemarle Division, I used 1/2" plywood w/ cork spaced about 16" to 24" w/ risers and thought it "springy". I will have risers again 16" to 24" on average with Homasote. I've thought about foam, but I'm not confident or comfortable "quickly" mounting tortoise machines and other accessories from the bottom of the layout. The plywood seems "Kitbash" proof from the underside of the layout. My benchwork will be simple 1x4 framing with a plywood or Masonite skirt. I'd like to know what thickness/riser-spacing have others used here?