I often swap from from risers to drops which can be bit of a pain to center and level them and torque the 4 bolts properly (even gaps and such). Thinking of purchasing a second stem and just swapping bar and stem as a whole unit since it's easier to align the bars over the front wheel and less bolts to fiddle with.

The steerer tube is cromo, doing this once a week shouldn't put undue stress on the fork or headset over time? That was my only concern.