Johnston Prop Hub

Update Dec 3 2016:
This was tested this summer and it works well. it took full throttle at the dock for 5 mins. the center hole was just a bit tight and we didn't want to hammer it on, so we ran a drill bit down the center by hand (sorry don't remember the size) to scrape off just about a mm of material and then is slid right on.

I made this part as a replacement for the stock Propeller Hub sheer pin assembly. it seems that every time the sheer pin breaks it also destroys the Hub. I am unab