All,
Checking in to see if what others may be willing share about Puck material. I normally run natural Gum Rubber in the rear (40 durometer) and a black (can't remember the type of rubber) in the front (60 durometer). This is for a KBS style can. Looks like this stuff has gotten expensive since last time I looked at it- $40-$60 for a 6x6 sheet at McMaster so I hate to buy to many different types to play with.