Let me know about the Pump 120 OS
Blackie, let me know how yours flies with that OS 120 pumper. My flies great but goes rich and cuts off during high G maneuvers. I modified and put a 8 inch flex pipe extension with header so not to cut into cowl. My flies great with plenty of power. I love the stable flying characteristics. Do add some extra glass cloth inside wheel pants and get some real 4 inch wheels with extended axles from GP. The supplied Mickey Mouse wheels will cause extra trouble. Good Luck!!
BobHH