driving value with propertie box (or other)

Hi everybody

I have value enter into the custom properti box (or into the configuration specific box which is 2mm

and want to drive many different feature with this 2mm value, because i'am drawing everything in 2mm metal sheet, but we might change for 3mm thickness.

so my question is how do I use a property (or any other trick) to drive everything and change the whole part thickness by moving only one or two different value ?

feature such as "body-move" or "thicken" don't look able to be drive easely...

any help will be appreciate