The BME 110 is a single bolt hub and it works just fine. For those that may be curious, the Brison 6.4 (105) is also a single bolt hub.

I have some experience with both engines and you will not have any problems if you remember to tighten the prop nut. A second jamb nut is not necessary for either engine. Steve's suggestion to use a washer between the prop face washer that came with the engines and the nut is an excellent one.



Edit,

Thinking back, I may be incorrect with the BME. It may have pins or a multi bolt option. I'm not near any engines for a while so checking is not possible. Ralph, where are you so you can help clear this one up for me?