RE: CMP BF109F BUILDING THREAD
Kalog
I have tried to true the hole. It is 9.97mm. I think it may work for you. The two holes in the backplate are to hold the backplate in place since I need access to the center hole.
Please note that on the back of the CMP spinner I have removed the raised section that contacts the engine/motor flywheel. I did this because my OS 108 flywheel has a larger diameter than the backplate so I think more surface area is better.
If you want it I'll just drop it in the mail, maybe a padded envelope or CD type box. No big deal.
I wish I could spend more time in the shop, but time is limited. I already get "the look" when I'm in there too much.
Hope you understand.
Steve