Gingko or Symposium Ultra Platform??

Hello,

I am considering a 18X24 Ultra Platform for my Super Scoutmaster rim drive.

I have a question. What kind of footers are under the Ultra Platform? Does it just lay flat on your shelf?

The top shelf of my rack is smaller than 18X24. I am currently using a 18X24X3 maple cutting board with cones installed on the bottom.

Any info would be appreciated.

Thanks

Tom