Could you make pitch bend a midi-learnable controller?

One fun thing that I do is learn the mod wheel to coarse tune, then center the mod wheel and play it record scratch style or try to transpose the loop into a different key. (try it, it's tons-o-fun!)

The pitch bender would be a better controller for this because it's self-centering and bi-directional.

While I'm wishing, it would be nice to limit the coarse tune somehow,
to be able to set a min-max amount.