The sids take v brake bosses.
I think they are m8.
Bonthrone bikes had them for sale when I bought the forks and maybe I can dig out a set, I'll let you know this evening..
The hope cable guides unscrew to change to v bosses.
They do have a starnut fitted.
The screw on the extralite stem has a healthy thread.
It's the head that is damaged.
It is damaged in the on direction so I tighten it before the others to avoid damaging it further.
It still has it's shape to unscrew though and comes out like it should.
Unfortunately its quite an easy thing to do to these bolts because they are 3mm allen key heads.