Waynehere is a pic of my installation. No other way to mount it. If MA did not want holes drilled around the center shaft, I am sure they would put all kinds of warnings on their packaging. As you can see, this prop is similar to every other wood prop. It may not be a very GOOD prop, but what would it be used for if you couldn't drill holes for prop bolts. Sorry, don't mean to be bullheaded about this, but I think MA must be confused. I drilled it and no problemsso have a couple of other guys. One guy at my field had the same prop with, I think, 6 holes and has it mounted on a 2 cylinder 80cc of some manufacture.

Regards.

Greg