[phenixbb] contour values for Polder and FEM

[V F]

Hi all,
What is the recommended values for contouring for Polder and FEM? In
pymol, I have a

isomesh polder_COA_mesh, polder_207_1, 3, select_COA, carve=2

isomesh FEM_COA, fem_coa_190, 1, select_COA, carve=2

Are these sensible values?
Many thanks,
Vero
PS: Both identify ligand very well!