{YS is harder to set up and more tempermental, but makes gobs of power. }

Don't know where you got your info about YS from. But YS is easy to get set and your right it does make nice power. I can take a brand new YS and set the needles accroding to the instructions and have it preform flawless. Then as it starts to break in some, just tweak the needles a little at a time. Once they are where the engine is running nice, you just leave them alone and fly.

David