I'm putting a few new ceiling boxes in my unfinished shop/garage. In the near future when I finish the room, I'll be dropping the ceiling by a few inches. What's the preferred way to leave a little extra wire at the J-box so it can be dropped and/or moved in the future (maybe 12-18"). Would you just leave some slack or would you fold up the wire/coil it outside the J-box? I'd like to do a neat job in phase 1 just in case I never get to dropping the ceiling/finishing the room. Thanks.