That measure of shaving off the 2mm from said bolt will be the measure of last resort.
@Wes in his video has perfectly captured the issue, but for the benefit of future people he was vaery thorough in his explanation which makes for a long 20 video. But he got the issue perfectly.
Currently, my plan is:
1) procure a long 3mm allen wrench - to adjust the FACS and see outcome - pending !!
2) procure 2mm shims to see if the clamp now locks - trying this now....
3) decide depending on result of 1) and 2)
and BTW, Many thanks for every contributor no matter if moving the issue forward or not - all contribs are appreciated!
will report on 2) soon as possible.