How do you edit your heel polar in Expedition?

I know I can go to Sail - Polars - Heel polar and edit the heel polar like I do for the normal BSP polars.
However, tests seem to be displayed randomly or not at all

Furthermore I would like a box to enter the minimum %PolarBSP (like you have for %VMG in the up- and downwind editing of the BSP polar). This would allow you to only display tests on the polar with the highest %BSP so you can draw the heel polar lines through them.

But maybe there are betters or others ways on how to optimize a heel polar. Eager to learn from your experience!