Hello all,
I am looking for the owners manual/instruction manual for the HB (Helmut Barnhardt) .40 PDP (Perry Directional Porting) engine. I checked MECOA and they only seem to have the generic HB instructions. Just wondering if anyone out there would happen to be familiar with this animal in general and possibly would have access to the manual. In particular im interested in the manufacturers recommendation for prop sizes as well as fuel. If anyone has run or does run one of these please share your experiences as well as any advice you might have.

Thanks in advance