I am not sure if the G38 hub will fit, but for the price it is worth a try. FOr that price i may have to start using them It is not worth over an hours work to make them if that is all they cost. I will be watching to see how it works for you. That type of hub setup on a mag engine is the way to go for sure.

I looked on Horizon and the hub is $24.99, Washer 7.99 and prop bolt $2.99 so the total for the setup is $35.97 plus shipping. We charge $45 and it comes with a machined and ballanced flywheel.