[quote=Chris N. ]
A good platform doesn't vibrate. If it is the platform it'll vibrate more than it should which can can slow down your progress. It's an easy fix if you just add a piece of plywood.

"It's an easy fix if you just add a piece of plywood." I have a speedbag in my garage. It's an everlast platform, but I threw away the swivel and the bag it came with, and got an extra small bag and a pro swivel, but the backboard is kind of...slow. How exactly would one put a piece of plywood on there? Forgive me, I am no good with wood and tools...Thanks!