About the PN prop...

A friend of mine has been using it this season with a 170, and that combo sure does give his Twister pretty impressive performance both up and down. Full throttle is just way, way too much power in most weather conditions... But the noise can be pretty impressive too, passing the noise check is a problem and in the air at high revs it kinda sounds like a 110 YS with a master airscrew prop

With the 160 it just might be OK though, I guess...