01-27-2014, 08:14 AM
Here's the adder/ subtracter.
http://i858.photobucket.com/albums/ab149/Sander_Grindheim/2014-01-26_215945_zps5478bc12.png
http://i858.photobucket.com/albums/ab149/Sander_Grindheim/2014-01-26_215945_zps5478bc12.png