Franken Fox update; Project FDX. MDS .40 Piston/Liner/Head, Fox .50 case, crank, rod, Fox EZ carb (.330") -- 10x6 APC 10% nitro 20% castor MC59 glow plug - 11,500rpm. 25% nitro 20% castor gave12,300rpm. That's with .035" head spacing. Making some modifications and will retest. Idle speed was stable at 2,400rpm. Carb is probably a bit too big at .330", had the airbleed closed to get a good transition from it and even then it was a tad lean. Top end was okay though the big head spacing is limiting power.