I have 22 & 25 cal. marauders that are stock, would like to know your opinions what are the best o-ring kits available. and also some of the you tube videos to watch to learn how to rebuild them. I have watched quiet a few some are crap some are good. I know this has been asked before & sorry for the repeat, but I no longer have the search box on this site or it is somewhere else. I try to read everything on here even if it does not pertain to what I want, but there's a lot to take in. I have learned a lot from the different posts & believe me it is appreciated. Just would like to be prepared when the time comes, they will probably wined up in the safe after I get the new FX - . I just have that urge for a high end gun. Thanks for your time Darell