Hi Lowlevldevl.
Yes, I have already changed the engine because it needed a lot lead (1 pound) in the fron to balance the plane with the Saito. Also my plane is 13 lbs and with so much work in it I was affraid to have problems with power, so as the OS is almost twice the weight of Saito I wonīt need to put so much lead at the front and it has more than sufficient power for sure.

I donīt want this plane to be a great performer, just to fly it scale but to have sufficient power in danger situations, if I need it. I think I will fly it at less then half throttle all the time, so it wonīt overheat inside the cowl and the fuel can last so much time as with the Saito, I think!!!
Do you think I made wrong?

Thanks again for your oppinion.