RE: 1st Gas engine advice
If you want a g26, buy one from RCIGN1.
It is much lighter and is converted to an electronic ignition. I have one and it is great. The best prop to use is a mejz 18x6, let the engine turn around 9000 on the ground and you will have about 17+ lbs of static thrust.
Ralph is going to be out of town for a while if you don't hear from him.