I can't agree on building drawers first. Build your box to the size of your largest tools. The full extension slides you are using reqiure a 1/2 to 9/16 space on each side of the drawer box. Just subtract 1 inch or a bit more from the rough opening of your cabinet to get the drawer size.


1946 1-ton Panel
1952 1-ton Comml. W/Grain Body