Hi Everyone, Well I have been flying for 20 years and after reading all these post am a little nervous to fly my bee. The GP model is in my opinion one of there best arfs. I am using a OS-120 pump, Mcdaniel glow system, sullivan metal horns, elektrotek super rocker and plate system. My model weighs in at 12.1 pounds. I will maiden her on a asphalt runway till I get used to the landings. I drilled holes on the outer edge of the dummy engine (one above each cylinder 1/4 in) to allow some airflow through it along with the large cutout for the 120, I will keep you posted if it makes a difference on flight characteristics. Steve