Not familiar with DAG, but did loads of motorbike frames in Belco, as well as a Morris 1000, bought for £5 needing a couple of wheel cylinder overhaul kits, and a VW Beetle, also bought for a fiver, which needed a top end overhaul. All done in the street then. You were dead posh if you had a garage back then.
My pal Del still uses a Cromwell pudding basin when blowing a few cobwebs off his Rocket Goldie or Road Rocket.
The first helmet I bought was an Everoak Racemaster, the most expensive you could buy at the time when jet style helmets were still quite new. It was 95/-, or £4.75 in new money. I'd saved all summer to get that. Up until then I'd been using a damaged ex Norman Surtees helmet. Good old days for sure.