I have a Thunder Tiger .61 which powered the maiden flight of my 4*60 today. It ran fine in flight and idled OK as well (finally). It was extremely tempermental on the low-end mixture adjustment, though. My instructor and I worked on it for well over an hour before we got it to idle reliably. We switched to a idle-bar type plug, which made it slightly better, but ultimately it was just a matter of getting the tuning right. Has anyone had any experiences (good or bad) with getting this engine to idle reliably? Thanks.

I like the way the high speed needle is situated- at an angle, back and away from the propeller. Maybe it's not quite as safe as the rear needle adjustments, but I think it's a good combination of safety and performance since you don't have that extra piece of fuel tubing to worry about.