J600 is a great motor
Hello Mach1
My friend has 2 of them here in Hawaii. Great motors he has the earlier versions with the orbit controllers. I hear that the new ones with the TEMS are even better. Anyway he flys the engines often in a Avonds F-15 and a Yellow F-16A. Both are great flyer's and get off of our rough grass field with no problems.
I think he has at least 40 flights on the F-15 if not more. and 20 or so on the F-16. They start every time, and put out great power! I would not hesitate to get one.