Bought 3 sets of these dampers & all the rubber buttons on the top of the spring disintegrated. InFound out it is not rubber but thermoplastic. I Designed & built a 4 cavity silicone injection mold to produce exact duplicate with a high quality 60/80 euro black silicone. Will last almost forever . I’m Trying to get a feel for how many other GT owners have the same problem. I Also have many NOS parts OME in the box I would like to sell on the forum but not sure how to sell on the forum , if possible please advise