A couple genral questions

I have a block I use the same position on each time.
I'm think I recall years ago this system worked, I can't say which change buggered it up but it would be nice to have it working again.

I used a measuring station on my Walter Large Power years ago, it sure made thing much easier and way more accurate. (Sold the company so those toys are gone).

I put in 0.00 for all of them.
I thought they just needed to be relative to each other, the program reads the table and applied the "H" value when G43 was called.
Am I wrong?