I`m going to fly the Nemesis 90 from Protech with my OS 91 FX. So far I have used the original silencer with previous planes, but now I will use Hattori 700 tuned pipe with a modified wrap around header for OS 160 FX that will fit the 91 FX. I will also use the VP 30 Perry pump and APC 14x10 propeller.

I dont`t know whether this setup will be enough for vertical pattern flying, but all in all this setup doesn`t cost too much. I consider using this plane and compete in our Nordic F3A program next season.