Is that what Tru-Turn recommends? I think you're referring to "flat-head" screws that you counter sink into the backplate. I actually just got another spinner/backplate for one of my BME's, and they had the same old instructs in there, and the new backplate wasn't knurled... just like they did it 15yrs ago.

It would seem more viable to knurl the backplate... and I'm curious if Tru-Turn would do that upon request.. or of that was there "fix". My machine-screws(that serve as dowel pins) have never given me any trouble, but I was just curious what BME's answer to the situation was. I probably have no reason to be leary about it, but I've always wondered as I've seen modern engines evolve. These BME's are old school though. Still great engines. I'm a fan. Would love to get a hold of the 116.

I own 4 BME's. Two are 50's, and two 102's. The 50's don't even have a dowel pin set up(read machine screws on the hub), and they work fine also. My newest 102 has an upgraded hub with mulit bolts for the prop... so yeah, I have experience with the BME's, just curious what Tru-Turn said. I'll have to ask them next time I order something. Thanks for your response.