Recently a friend and I worked out a deal and I traded my Byron P-40 that was powered by a DA-50 for a Ziroli P-40 powered by a 3W-85 Competition Series engine. I flew the Byron P-40 for the last couple of years and enjoyed its performance. I will warn you not to let one rotate to soon, or attempt a slow approach. Once ready to fly she was fun, once ready to land she made you work.
Enjoy the video:
http://rcuvideos.com/video/P-40-Kittyhawk-Flight
I have 3 flights on my Ziroli now, but had to pull the main gear for an overhaul.
The attached photos are of my former Byron P-40.