I finally got a TT 91 4 stroke, I heard good things about this engine (more power than the OS, more weight to balance the tail)! I'm also planning to replace the plastic firewall with 1/2" plywood secured with some extra screws, as I did with my other aviomodelli Tango. The firewall included seems to be a little weak ... In the tango the front gear is attached to the firewall which broke after an almost perfect landing!!!!
Plane Racer good looking color scheme! What is the final weight of your bipe? I'm afraid mine will be more than the 3600 gr stated on the box! And which paint did you use?

thank you
David74