I actually just did this mod and I'm going to stick with the low beams in the low beam socket. Shaving off the tab is no issue, but the circumference of the gasket part of the high beam bulb is smaller than the low beam bulb. It will work but the fit is not very good, the bulb has a tendency to go in crooked and screw up the direction of the beam of light coming out of the headlight. I don't know if I just didn't give it enough time but it just doesn't seem like the fit would be reliable for keeping out moisture, or for keeping the bulb perfectly straight in the socket.
