Wonder what results you guys get with air pump repairs. Do you find it works out okay and how do you feel about finding the parts you need? I have what must be a really cheap small air pump and it has both diaphragms split. Easy repair job IF I can find parts to fit. Are these somewhat universal or what do I need to know to find new ones? It's cheaper to replace parts lots of times but not if it doesn't last. Any thoughts on that?