sorry i thought you where talking about the vf conversion. the hanno is the 24 mm stroke crank and hanno stock rod and 24 mm piston which certainly seems to have been specially made for this engine. I will post an engine test in the next couple of weeks weather permitting.this is a cold winter , have seen -47 with out the wind chill.i have quite a few 13 13.5 14.4 APC props to test.so you guys have a good one.