[scottz]

I moved all mine up. I think I just moved them 1 hole because the front jacks could only move one. I think the center and rear can go up further if you want. Easy job (really easy if you have an air or electric impact wrench), I think I did all six in less than an hour. Everything works fine. Just be aware that when you move the jacks up, you will not have as much height travel as you did before. Easily solved by carrying some blocks (I do but have never had to use them). Well worth it if it keeps you from dragging a jack off.

No need for calibration (not even sure what that is). The jacks don't know how high they are; this is no different than putting a block under the foot.

The only calibration that I am aware of is the zero point so that auto level is actually level; has nothing to do with the height of the jacks.

Here are the instructions for zero point calibration.