so any of the semi-pro or pro electricians use the lipstick method (where you apply lipstick to the front of the outlet box and put your rock up against it, then remove rock and there will be on outline in lipstick on the back of the rock) when dealing with an older building? when doing our kitchen (house built 1892) it worked great for us!

any other methods used besides measuring? i have seen a peice that attaches to the outlet box with metal pieces that puncture the drywall to give the outline. how about the tool that they sell that has 1 part you attach to the outlet box and then put rock in place and there is another part that finds the other one through the rock? i tried to find a link to one but to no avail. saw it in a sears catalogue.