Quoted from bdaley6509:Definitely this. Not sure felt will do the trick.
I can confirm this does in fact work. I added the pinball life felt over the metal protectors and have space around all legs.
You can double up the metal stand offs or get the Mantis ones which are thicker.
All owners need to do one of these options, or there will be wrinkling of the decals if you don't take action.
Luckily, I did right out of the box. Enjoy the game and congrats!