Hans,

Myself are looking for an engine to my 25% Extra, flying weight guestimate 11 lbs. It's Laniers old full build kit so it is not a 3D plane. However I have made several weight reduction steps and are looking for an engine that is low on nitro (expensive in Europe as you know) and will give it rocket performance.
You have this all new engine at hands, do you think it is a good choise for my application, or do you recomend me to go for YS 160/170 instead?