Here be some pics as promised...
Cleaned and painted caliper next to "Unclean!" one:
Caliper being put with sliding-bit-that-holds-the-pads, Threadlock in picture to keep Mr IVA happy:
And the effects of the electrolysis on my scrap saw-blade!

Holey mother of god!
(sorry, couldn't resist

)
Went into town today, got a brand new, unboxed PSU from local computer fixers for £5. Can't get grumpy at that price!
Also picked up some bucket seats that I won on Ebay, 2 seats for £40 and he even threw in a pair of brand new 4-point harnesses that he didn't want!
The mounting holes are 16" apart and the seats are about 18.5" wide to go in my gap of 17.5" between the rails. Hoping they'll squeeze in, will find out tomorrow.