have the bike striped down. Going to replace the compressor, bag and possibly the check valve. I was wondering if it is still possible to get the "Doc Humphrey's" rubber cup(?) that I have read about for the bag? And would you replace any other tubing while apart? a bag and compressor, OEM type are about $500 from what I have found. If you have bought others from aftermarket, whom did you order from? not a "fun" job but I'm retired and do not want my dealer to get rich on my SSI limited funds.:yikes: