If the devices are not decora you can cut a huge amount off without problems. You need a chop saw, place a piece of wood across back of saw and set plate face down on saw. Cut slowly and wear eye protection. If you do not posses one, look for a house that is almost finished, there will be a carpenter on sight who will have a saw. If you ask nicely he will probably cut them for you, if you dont run into one of the (snobby ones) Good luck...
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