Well, I really hate to hear that about combat models company. Here's what happened to me: I bought 2 cbm planes from ebay. A f-18 and an A-10. I ordered the stuff for the f-18 back in february and they cashed the check march 4 and I still haven't receivfed the parts. I finally got an e-mail saying that the parts were shipped and must have been lost in the mail or something. I turned them over to the better business bureau of San Diego. I would suggest everyone do the same that has any trouble with them. It's the only way something will be done about it.
I really enjoyed reading this post. I too am learning alot about pushers and tuned pipes. Looks like I'm trying to step up with the big dogs. Just can't bite the bullett with the ($).
mike