Thanks guys for the input, I had one inmind to suit a YS 140 DZ not so much for serious racing just fun and scale. I was hoping to find one similar in size to the Bridi 1/3 scale I guess. I remember seeing that one perform well on a O.S.90 2 stroke many years ago, the size was great for me also... eg not to big! and still glow power, although 42% may still be an option? what span would that be?