Problem Topograpic Phase Removal with snap-2.0 beta 7

Continuing the discussion from Problem Topograpic Phase Removal:

I’ve seen this when the tile % overlap is too low. Unfortunately, the UI
doesn’t currently let you enter more than 100%.

x2 overlap (200%) is not enough! x15 tile extension removes all purple areas.

Tested value: 400%, 800%, 1000% … Purple areas remain visible.
Is there a way to determine the optimal tile extension value ?