There's already one out there, but it's extremely tedious to use.
If I remember, the command to shift between building public bricks and building normally is extremely long, plus it bugged BottomPrints so they would never display properly when the add-on is enabled ( even if you're not using it )
If you want that version you can go search it, should be in the add-ons section
Or I could just give it to you
now