I use to use the lock-nuts and space them out on top of the panel. I saw the Marksman tool in one of the magazines and bought one. It gives perfect spacing any size to any size with 7/8" spacing for tight work or 1 1/8" spacing for places where a lot of retrofit work is done. It also spaces the center of conduit from the wall allowing for 7/8" or 1 5/8" strut. THIS TOOL IS AWESOME!
