I guess everybody knows that DMM stands for Denny Moorhouse Mountaineering?
We met the "Wizard Of Iron" in Milwaukee at the ISA conference about a decade ago. Some tipping of pints was happening at the Hilton bar. He said he wished he had patented the figure 8.
At the time, there were 2 other forges located in Wales besides DMM. The others were Clog & Denny's firm, ISC (International Safety Corporation).