This is built from the BMJR kit for the Simplex 45 (45" wingspan) for 1/2A Taxaco. I made the test flights yesterday evening and was disappointed with the engine I built. I swapped some parts around this afternoon and went back out with it. Now it turns that Cox grey 7X3.5 merrily for near five minutes. Thermals abounded this afternoon and I got a 20 minute and a 21 minute flight. This airplane came out at 18 ounces but required 2 oz. of nose weight for proper flight trim. I built a Super Sniffer from this series that came out at 14 oz. balanced.