good article Dogmoat, thank you.
So turning a puller prop to be a pusher is not really possible.
Seems like pusher props are harder to come by. I'll go see what i can get in the size i need. Guess I'll get a couple different ones if i can so i can play with pitch.

Is it OK to mount the prop directly to the shaft of an electric motor? or is it going to give too many rpms or wreck the motor?

Thanks again