Nice, but I am pretty sure you should use C_Move. That could make your movement much more compatible (and polygon based) then just altering X, Y, and Z. Even ent_move would be a good idea. And couldn't your player end up in the floor and then have to correct itself by increments of 2? That seems to me like it is pretty inefficient.

If I am posting, it probably means I am asking a question. Or faking my knowledge by agreeing with somebody else.