New carb. set up.

I've been looking for the carb. that came with the $20.00 Fox and after two days I found it. I installed it on the engine and locked the throttle open. The venturi is the same dia. as the c/l venturi but the needle valve is a lot smaller. I went to the dog track this morn. and got in 4 flights. The new carb. runs better. I clipped the pavement on the third takeoff and split one blade in half radially and trimmed the other a half inch or so. 3 minutes of kinda slow laps. With a new prop it was back to speed.
The plane I gave up on is back on the gave up on list. I built it using r/c practice and it's too heavy and tail heavy on top of everything.