Getting 'Bulge' right

I was following the LB docs for setting up a new lens (200x200) and got the skew corrected but for the life of me, I can’t get bulge corrected.
The frame wasn’t far off, so I tried to correct it but only made it worse, much worse. It only allows a 1.xxx in the settings. Why can’t I use other numbers?
I should have noted the original settings.
Any help?
Thanks.
Max 50W Fiber

Not skew, scale adjusted.

You should be able to enter numbers from 0.8750 to 1.1250 in that field for Bulge:

If the selected Galvo 2 is the x axis, does galvo 1 have anything to do with it?