I fancied trying different strap options on my G so I went and bought strap adapters from Jays & Kays.
They arrived today; or at least an advice for £14 customs and handling fees did 😞 UK buyers beware.
A short trip later and here we are. Although made for a 20mm strap, I've fitted a single pass 22mm zulu diver canvas for the moment. Its an easy fit and the watch head holds steady. I found the watch head slid on a nylon 20mm NATO, although on the wrist the slight rotation of the adapters held the strap firm.
Overall I'm very pleased with both the quality and fit; just don't mention import duties...