Mesh Range High... Frame or Bed?

Hi All,

What is a acceptable mesh Range on a 500 bed? I was hoping for a little better.

Upfront info:
-Bed Temp always are 110C (for Tilt and mesh runs).
-Range is not much different with cold bed (but always run tests at printing temp)
-Z-Tilt is done every time I run a mesh run just to make 100% certain that be is level


Just to test, I reduced the area of the probing inwards a little more to exclude the edge of the bed and removed mesh_pps so that I could see actual probe calculations. Made very little difference.

Not sure if looking at the shape of the mesh if this is frame issue. Seems more like a bed warp, but the is a brand-new bed.

Any advise?
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