Been there! I rebuild hundreds of cylinders a year at work so I thought that I definitely could fix mine with a little work. NOT! They are disposable. Anybody who has tried to rebuild one will tell you the same. Even the repair manual says 'replace' not 'rebuild'. And if you have even one working funny you need two new ones. I would expect anyone who is a 'do it yourselfer' to learn this the hard way! It's our nature.
