RE: GT33 quits running.
Myself and a friend have both ran our 33's for the first time at the weekend and they both suffer from rough running at the bottom end. We spent all day saturday adjusting the needles which made no difference, so it does appear to be just a quirk of this engine. Lets hope it settles down after it's run-in.
It run's well down to 2200rpm, it's below that the issue starts. My friend was first to run his and at first he thought the throttle servo was the culprit.