Hi Scott, I have just PM'd you with some details.

As the others have posted - tank height is critical.

A couple of points.

I always seal the carbs with high temp silicone around the carb barrel where it mounts into the engine. It is possible for an air leak to exist around the carb retainer which is below the o'ring seal. This can cause a lot of weird needle settings to be made. I have asked the factory to change the sealing arrangement to a lower o'ring but who knows if or when that will happen.

These carbs are finicky about needle settings, More so than a lot of other brands - the needles do react to each other. I suggest starting back to the factory settings - about 1 - 1.5 turns out on the high speed and the low speed about 1.5mm below the face of the throttle arm (about 3 - 3.5 turns out with the carby closed). The high speed needle is more coarse than some of the other carbs such as OS use.

Then follow the usual routine of set the high speed for max rpm minus a few clicks, set the low speed for good idle and transition, reset the high, double check the low, reset the high and go fly.