Have a BME 105 that uses a single bolt prop attachment, it has heavy single direction grooves in in prop drive face and also two 6-32 allen head cap screws that form two short "prop drive pins" the screws are threaded into the drive face and help grip the prop, or the back plate if not using a spinner, along with the single direction drive groves, the screws do not go through the prop they just act as short pins, this is standard BME 105 setup as far as I can tell.

My problem is that the back plate for the spinner which has two matching holes for the 6-32 screw heads does not grip the prop drive face very well, it just sits on top of the single direction grooves, because of this the screw head holes in the back plate are tearing up. I need some kind of spinner that would grab the grooves much better than a smooth surface does which is what the spinner back plate has. Maybe there was a special spinner and back plate made for the BME?

Any suggestions greatly appreciated!