If you can get your hands on one the Norvel .074 is a lot better engine for your build. Way more power and lighter. You can find them NIB on ebay for around $80.00 US. However if your talking about a 35-40 oz plane you will be alot happier with a .15 to .20 engine, at this weight the .07 engines will be a huge disappointment. 18 to 25 oz would be my target weight with a .07 engine.

rrragman