Well, everyone has their limit. Maybe walk away for a few days/weeks/whatever and come back at it when you remember why you loved it in the firs place. In terms of getting taken advantage of... Sometimes that happens, usually because of ignorance. That's why we're all here. You won't get "taken" when you got backup...lol. Also, a little hint.. ALL mass rebuilder engines are designed to run until the warranty is up and when they go bad, they are total junk due to cheap fixes during the "refurbishment". 4 Years is a decent life. I've installed several ATKs, AutoTek, and Recon. They were all junk after a couple years and less than 10K miles.