R1DER said..
I need one tiny little slot box grub screw. Where can I get one NOR?
Do SUPs use the coarse thread ones? Anyone near Duncraig got a spare one?

I'd check these guys out. I used them when i needed a replacement bolt for a fin box. Big range of stainless bolts and grub screws and were they very helpful.

westcoastfasteners.com.au/

I have new spares of both lengths - I'll leave some in my letterbox in a ziplock and text you my address in Woodlands - if you already have some no probs!

Grub screw, or the machine screw (with a phillips head) like Starboard and RRD used and they go into a brass insert?

The latter are just M6 x 20 pan head.
M6 stainless pan head actually has two head sizes about 0.2mm different, one won't fit down the hole................ but you can turn it down with the screw in a drill chuck against a metal file.

Grub screw -I dunno what size, probably M6 again but you will only get them at specialty fasteners places - or from MOB geez he's a top bloke :)

A huge thanks to Reflex who saved the day and gave me a grub screw.
So I won't be coming over for dinner and a screw Mark you were too slow to reply.