I somewhat practice the two-adapter method but I take it further in that I've converted my S mount lenses to M mount with functional rangefinder coupling. This allows me to use them on my M240 and with appropriate adapter on my Sony A7ii.
Here are a few lens conversions I've done:
Mounted on the camera is actually the 28mm/f3.5 lens lens from the Nikon P&S AF600. The lens in the bottom left corner of the second photo is the 35mm/f2.8 lens from Nikon P&S One Touch L35AF. The three lenses in the middle are Nikon S mount lenses converted to M mount (50/2.5 Voigtlander Color-Skopar, 35/1.8 Nikon, 28/3.5 Nikon). The last lens is the Contax Biogon 35/2.8 converted from Contax RF mount to Leica M mount.