hilleja, thanks for the reply.I ordered the spinner from Don's Hobby's. The backplate was already custom reamed to 12 mm. Matter of fact, he custom-cut the spinner for a Menz prop.I am thinking that I have the adapter that goes clear through the prop.I'll have to take it to my tool-maker at work and have him ream out the prop a little more.Thanks for your help, you got me thinkin I'm on the right track.
I took a picture at 640x480 and the forum said the file was to big to post.