I have one, and two of my Buds do also. I run the T.H.
.75, one of the guys uses a magnum .75, and the other
a Jett .90. The Jett is the fastest. If you want to go
faster....you'll have to use the Jett, a Rossi .91 (piped),
or an O.S. .91 DF (piped).
Mine had flutter issues when I really got it cranking, but
I got it sorted out. The other two planes did not.
The Tower .75 carb needs to be twisted, and firmly
seated on the o-ring before it is cinched down, and It
will work fine. It as a high quality carb.
Dave.
