weldment custom properties

im still trying to make a single weldment that can do everything we will want it to do and i have hit another snag

our weldments will need to have more than one sheet metal part in them but when i go to insert a second part the custom properties of the first part stays universal so the second part i insert cannot seem to keep its custom properties

is their any other way to get a sheet metal part into a weldment while keeping the custom properties?

SolidworksWeldments