Keep in mind Flyboy Dave has both the 40 and 60 sized F-20's the 40 sized I believe is a DC (Direct Connection), and the 60 sized is a Cermark like mine--- I have seen his 40 sized "20" fly and it was IMPRESSIVE!
I am lucky enough to have had the opportunity to fly a couple of Dave's birds (Kaos, & Dago-Red) and he is a master builder and engine tuner---
Few people can make a Rossi howl like super-Dave
Disclaimer: No matter what Dave gets out of his Rossi-45 (18.1K with that black toothpick MA prop.) my Jett-50, 9x9 APC, Retract equipped Patriot was faster than his F-20 --
