Ok I just ordered one of these OS GT15's from Tower Hobbies and was able to get it delivered to my door for $299.00 I have been working on a NGH GT17 for the last 3 month's and even throw the engine always ran right I had a terrible time keeping the muffler on or together. I wanted a little gas engine to replace my OS 75AX I have in a Great Planes P-47 and this OS GT15 seems to be the right engine for that plane after ready these post. I will be reusing the JTEC in-cowl muffler I have on the OS 75AX on this engine and it looks like it will be a drop in fit. If I can get 9000RPM with a APC 14x8 prop the P-47 will never even know the engine has been replaced. I am looking to getting 10 to 15 minute flights with a 8oz tank. Thanks to all who have posted on the engine. You have made my choice of this engine very easy.
