I would advise caution if one of the options is Karbonite gears. I have had a high rate of failure in gas engine equipped planes when I used Karbonite gears. They seem to be okay for glow and electric. When they were first introduced, there was no warning about using them on gassers. It appears we were the beta testers.
Some application of nylon gears is appropriate when using gas, but on the bigger engines, metal is preferred.
Last edited by Lifer; 05-02-2014 at 04:13 AM.