Not Exactly what I wanted but I edited the menu_bed_corners.cpp file.
There is a line in there that displays the previous Z position. I found that it was calculated from the current_position.z variable and that it was nested in a function called _lcd_draw_probing().
That function is called with this line of code:
ui.refresh(LCDVIEW_REDRAW_NOW);
_lcd_draw_probing();
So, I changed the code to draw the current_position.z instead if the: (LAST_Z_TO_STR(last_z)) With: ftostr53_63(current_position.z)
and I rather hackily added the ui.refresh command just above where it was called originally in the: void _lcd_test_corners() function.
Now when it is testing the corners, it shows the z position as its testing, when it tests, so you can determine if you need to raise or lower the bed.
kinda wanted a live view and maybe a static readout of some kind but my programming knowledge is a bit lacking. If anyone knows how to do this better I'd appreciate it.
Thanks.