converting lbs to kg

We use dual dimensions on our drawings so we also includeboth lbs and kg on the drawing. I have the lbs linked by a customproperty in the model, but i can't figure out how to link a customproperty for kg.

Some of the options are using a general table, but I'd rather havea note. I could also use a desgn table in the model.

Anyone have a good idea on how to do this??SolidworksDrawings And Detailing