Thanks Dave for more good info. I've seen some other posts about the muffler coming loose, and the air leaks. I'll take your advice. I like the rear needle but if it gives me trouble, I'll try moving it also.

Your F-20 looks great (which manufacturer?). I've seen some of your other posts... Didn't (don't) you have the Cermark F-16 with an OS 1.08? I have one with an OS FX .61 on. I tried the Jett .90 and between it being so unbelievably noisy and drank the F-16's small fuel tank dry in less than 3 minutes I got rid of the Jett. The Tower .75 would probably be a good choice (for me) in the F-16.

You seem to like MAS props. I am under the impression (some knowledgeable post or article) that the APC type prop gives the most speed (RPM) and thrust for a given size prop on a given engine. What are your thoughts? I want the enforcer to be capable of high speed but still want adequate thrust if I get into trouble. I don't have too much choice with it being a pusher.

Shok, I think the 12x7 would be good for me to start with but I don't know of a 12x7 pusher.

Bill