My son and I built a bike as a project together and we could not keep the chain on the back sprocket. I brought it to Stan and he spent quite some time disassembling it ( I didn't pack my wheel bearings which is a common mistake people make when assembling one of these) putting it back together and truing the sprocket. Explaining the whole process as he is doing it. He declined payment for this service and when I insisted he suggested i could make a donation to his favorite charity (Child Fund) which i gladly did. This man is serious when he says he wants to see everybody on one of these bikes. Again, Stan, thank you very much. Dan M.