Hey guys, I'm in the process of builing up a 1/3 scale pitts (no particular plans)I'm making alot of modifications, to fly the plane better, not just scale but all around better handling. I also am planning on using the latest version DL50. I talked to Bob at DLUSA, and he said the prop hub to the back of the standoff measurement is 6 7/8" ,but he was a little vague in being sure. And since I haven't constructed an engine box yet I was hoping to have someone here verify that deminsion so I can make the box to fit that engine ,with out spacers etc.