so a few updates in timeline order. first, very overdue update pics for the kona (long enough for chain to have rusted from the salty winter roads - after taking these photos I have cleaned and re-oiled it!).
Got rid of the thumbies and went sram 1x9, also swapped the cheap tektro v-brakes and blue retro levers for some avid arch rivals (i'm a sucker for parrallel push) and 1.0L levers.
Also some detail shots of the light system (LEDs in vintage lamps, running off 4xAA batteries housed in metal bike puncture repair kit tin, with secret under-seat switch). And the stem which was a cool ebay find. It's Nitto, 22.2mm BMX stem (most are 21.1 so very unusual) i it gave a polish and paint, was all silver before and pretty beat up.