Quote Originally Posted by curious aardvark View Post
Sheesh talk about highs and lows.

It sounds like the z-axis end stop might have been too high. Ideally you want the bed - if it has them - with levelling nuts screwed up pretty tight and the z-axis endstop, set as low as you can get away with, so that there is absolutely minimal head adjustment needed.
I'm not sure the TL-D3 Pro has a way to raise or lower the bed other than through loosening and tightening the corner springs. The Z-axis end stop can be moved up or down through software but only at roughly 1 cm jumps. If there is another way it's not all obvious.

When I finally got things properly levelled The springs were only 4 to 5 turns tighter than loose enough to self loosen so that is unfortunate.