I find it incredible that this thread has mentioned nothing about the barrell issue. The #1 drawback of this engine. I just did exploritory surgery this morning on my 2300, and found that it has the dreaded "dogleg" disease. Here is a thread on the "fix" for its issues. I will be doing work on the barrel this afternoon..... Greg

http://www.rcaerobats.net/STEng/st2300_barrels.htm