change sheet metal K-factor

Hi All

I am trying to change K-factor for sheet metal parts; unfortunately my macro changes the value only if "Override default parameters " is ticked manually;

Could anyone help me to reach  "Override default parameters " option through API and change K_factor even if it is not ticked manually?

Maybe somewhere is hidden the API for CustomBendAllowance similar to swSheetMetal.SetOverrideDefaultParameter(True)?

SolidworksApi macros