I'm way ahead of ya brother..I looked into it, and the main problem your gonna find is the cutting process..... I'm using thin car inner-tube rubber,and unless you havedyes"razor sharp" and have a press that can stamp them out in an ultra fast motion,with a ton of pressureyour gonna find that rubber is a LOTharder to"stamp out" then you think, and if you use some kind of foamrubber material thats easier to cut, then the pads will wear out a too quick...bottom line the cost vs return just isn't there(bummer)..better off just getting a good pair of scissors. The only way it couldreally work is to have itcut the rubber from both sides at the SAME time. Tosee what I mean take a piece of inner tube and cut out a shape with some scissors...a little tedious but very do-able. Now take the samepiece of inner tube and try to cut out the same shape with a brand new exacto knife...next to impossible and takes three times longer(even though the exacto is much sharper then the scissors)..