RE: Seagull Yak?
Yep, same here. Box stock with a 20cc RCGF gasser.
A fellow club member has this bird with a 20cc DLEand it flies great with plenty of power. Hope mine flies as well. I'm a bit concerned about the 500 RPMloss without the velocity stack and am considering going to a smaller prop to get more RPM. I think mine should turn between 8 and 9K so, I'm down on RPM by a bunch. We'll see tomorrow.
RJ