Same here, was a different ballgame when you just had to play around with voltages, now theres so many options to prat about with (any one of which could be the cause of instability) it's just tedious.
Yeah, it is a lot of messing around, although I do enjoy learning the nuances of hardware. Anyway, I had some time to kill recently and after about 3 hours of fiddling I had barely had a 10% gain.