Almost Fried, some of your suggestions would get some fired...
Aluminum foil on a kearny is dissimlar metal contact. And a screw in a finish floor is a back-charge from the GC, or just plain un nessesary damage, sub-floor I do it all the time too, but not finish. And if nessesary to fish with a panel live - try a fiberglass fish and pull into the panel.
Over the years I have learned some interesting ways to work alone nobody on site pulling wire, and this is one way for pulling in pipe on short light runs: Take some nylon fish line, or building string and pull it through first, then take it back with you to where you are fishing from, so now you have both ends. Then attach your well lubed smooth head to the string where you are pulling from, then pull the string from where you are pulling to until you have some high tension. (the string stretches...) As you push the wire in, the tension will let off, you just give it more. You would be surprised at how far you can do this from.... You can even do it walls too. Just beware of sharp edges ar the box you are pulling to. You can also use any number of things as pulleys just make sure they are metal so the string doesnt burn through. Toll box handles, paint can handles, a staple on the wall or the floor or cieling, furnature legs, ladders if it needs to go up, etc. It just has to be heavy enough not to move when you apply tension to the string. For example pulling through pipe in a slab floor from the other side of the room. Pulled into an outlet box by having the string go up over the rung of a ladder, then down on to the floor through the handles of a saw-all and drill case, then over to me. Put tension on the string, feed wire in, put tension on the string, feed wire in, etc. When your done with string just ball it up and toss it, the stuff is cheap.
One more string item for setting cans or boxes in a line: Set the farthes two away from eachother first, then place the string under high tension on simular edges of each. Like the top of the boxes, or sides of the cans. Then you can set all the rest right to that same simular edge that to string is on for the first two. If the string is tight, it will only deflect and 1/8" over 100', thats better than most lasers for acurracy...
Hang cans with carpenters "quick-grips" clamps, then screw them in. Saves fumbing around with a can sitting on your head while you try to screw it at the same time. (For metal framing or those cans with no nail-ups)
One more quick one, lock cans in place by putting a self tapper right through the brackets and into the can frame. Helps if you clamp the whole bracket and can with vise grips while putting the screw in. But that thing aint moving after that.
