I been eyeing on this riser for a while but every time when i am about to pull out the CC i stop because of the rubber integrated shock absorbers. 2 Q 1.does Gillo have a life time warranty on the rubber...rubber don't last. 2. can the riser function without the rubber? don't want the rubber crumble on me ten years later and i end up with a very expensive paper weight because i can't get a replacement.