Bill fired this volley in news:0338e61c-7dfa-4c13-b163-
:

I guess what I should have asked is how it actually
works.

Seriously -- "how it works", or "what's it for"?

Most lathes work best leveled end-to-end and front-to-back at _both_ ends.
If this raises only one foot, then it's to take any twist out of the bed.

LLoyd