Yes mate the main mounting holes on the caliper are elongated to allow side to side adjustment of its position on the fork.
Easiest way to do it is loosen the bolts slightly, squeeze the brake lever to centralize it on the rotor, then while still holding the brake nip up the bolts again. (EDIT: maybe best to centralize it by eye then adjust your pads accordingly. The method above is for hydraulic brakes)
Didn't get chance to look at the brakes again, youngest's birthday + work!
But I did get a couple of cheeky purchases.
Ashima 160mm rotor:
Kona branded black seat post, I don't car that it's heavier than the kalloy, some things have to be done:
And the Kula Gold 18" frame really is a beautiful colour:
Bit of chain suck damage to the stay but generally pretty good. I believe it's a 2011 and it looked pretty well specd up
OK i'm all weighed up, ive not included an random bolts and cables and grips, so the weight will be a bit on the light side, still lots of room for improvements.
Affordable changes are probably frame, saddle, seatpost. a nice wheelset would be great but can be pricey, especially as I'd like to keep a bit old school and run rim brakes and tubes, and I've guessed on the spokes/nips weight based on the full wheel weight less the hubs and rims (from google).
All this comes in at 9.835kg, weighed on kitchen scales, not digital!
I can probably shave around 1.5kg by changing to an ally frame, a charge saddle (£30), some wellgo mg1 pedals (£40ish?).