One of the problems with keeping the legacy aircraft flying is as they age, more and better maintenance is required. Unfortunately the business model for these planes requires a cadre of enthusiastic volunteers with a dodgy budget. These volunteers are great but to a high degree not A&Ps or IAs and do not have the training and oversight needed to maintain a complex ageing aircraft. Too much maintenance gets done improperly or not at all. Nobody seems willing to stop and say"Whoa guys, this just ain’t right!" Actually given the condition and lack of disciplined maintenance involved, it is a real tribute to these great old airplanes that they don’t crash more often.