Hi Speedy, M-F and Norm
I'm not convinced about that repair - that one outer bolt will be sufficient.

This was such a clever design - that solved a problem - blade holders
coming loose. My understanding is that the centre bolt's main function
is to keep the boss in place.

The outer bolts take the rotary loads of the blade-holder and thus prevent
the centre bolt from loosening.

Cheers
----------------------
Jack