I agree. 4strokes have been much less tempermental for me also. Some I have even flown straight out of the box(magnum, saito) without problems. I wouldn't recommend that though.

I have found the bigger powerplants take a little more time to break in, but are still easier to use.

I've mounted them sideways, inverted, up straight with no problems. I even have an airplane were the fuel tank centerline is two inches above the carburator of my inverted saito 100, and no problems whatsoever! :boxing: