I would do it like this to move the points a bit further to the center of the bed:
[z_tilt]points:50,50450,50200,450
[z_tilt]points:50,50450,50200,450
this should lead to a triangle which is a little bit more off the edges. could this work?
Solution
Ahhh thank you. That was what I was searching for. TBH it was 2 in one question. First of all if it is correct and 2nd how it is defined right now. This is the config for the 500:
points: 30,30 250,460 470,30
Means the actual points are 30mm from the edges. And my suggestion is 50mm off the edges. Ok thx