For those who helped, and for anyone interested, I can confirm that YES, the three-gear MM conversion WILL fit the 22 1.0... despite it not being listed as compatible, and despite getting an official 'no it won't' from the TLR email help line. The body needs some decent massaging with the scissors, and that's probably the biggest issue. Aside from that, it went straight in! Will get some pics shortly, but the gearbox has identical mounting points.