You can do the same job with a stubby Philips head with one hand and a box end with the other hand, .....
Really?
last time I did an adjust on a conni I used a regular flat blade S/D....
and as for the tool, it's nice, but I always carry the 10mm end wrench, and screwdrivers in my kit....I don't feel the need for carrying a "special tool"....besides, I still haul around spare J-boxes on rides, even though I ride a C14....and brake levers, and wire, and .......