Hi All; I have been playing with a Saito 56, and have found that you can lock the throttle in just about any position with the idle stop screw on the carb. Mine seems to run best with a 13-6 prop with the carb set to about half open. By locking the throttle, it also takes any slop out so that the barrel can't move in and out and change the mixture. I only have experience with the 56, and was wondering if the others are the same.
Jim Kraft