CustomPC,
I started this post for the reason you say you stopped using you version 1 NGH GT17. The new Version 2 NGH GT 17 has more that just the carb spacer. It has the newer NGH ignition that is a high voltage ignition that will use up to 8.4 volts. I am using a Life4 6.6 battery on mine and so far it has been a good running engine. I have had many gas engines and all of them have been the larger size 35cc to 60cc. This is my first gas engine in the smaller size and I wanted to see how well they perform. I have a friend that has the little 10cc Evolution gasser and it runs pretty good. I'll give a flight report this weekend. Thanks for you input and I know you'll have a great time with your OS 15.