Rubber

Other than looking better, will worn out rubber generally have less "sticking" or grip? Is this not an issue usually? I don't know if it's just me but I find the more my laptop's rubber feet wear out, the more sticky it feels and therefore actually grips better. Might this be a good thing or am...

I got a Cooler Master TX3 off of eBay recently, and I wanted to add a second 92mm fan. The original fan came with the rubber corner vibration dampeners, but the $6 Arctic fan I'm eyeballing on Amazon doesn't, of course. Can I just cut out some triangles from any piece of tough rubber and glue...