For those of you that do it, (work on PCP's your own or others), which ones do you consider "easy" or "hard" to work on, not necessarily tunning just sealing and replacing parts on different makes models ect. I've never had a need to do major surgery on a PCP myself, getting the parts and having the "special tools" would be my issue, just a matter of time I guess, in the auto repair business there were models, makes that would make me "cringe" and others that were a piece of cake, I would like to hear your opinions and experiences...thanks!