Hi Guys. Relatively new to the hobby here (just over one year on the sticks) and found this thread. I've just purchased a new 2300 from Tower with the Bisson muffler. I read all the posts and was quite nervous about the engine due to the press it received. Here to say that I ran the engine in on the plane until it idled at 2200-2300 rpm, transistioned well and got about 8700 rpm on the APC 17X8 prop. Started out rich and fine-tuned it 1/8th turn at a time. Pucker factor was quite high yesterday as I took it up for the first time. I didn't plug any ports on the exhaust, don't run a pump and I didn't even have to turn the spray bar from stock. It flew fine and is still a little rich on the low and high end. I intend on keeping it there until it tells me that it doesn't like it anymore. I'm running 15 percent Magnum fuel. The only real problem that I found was that if I slowly close the throttle, it sticks. I believe it is because of the rubber seal that goes between the throttle arm and the carb. I think it's still a little "tight". If I blip the throttle, it closes completely. All that to say this, so far, the engine has proven itself and if it continues to run like it did yesterday, it will be a long, happy relationship.

By the way, I used to fly this plane (Goldberg Sukhoi) with a 180 Saito.