I would love to only save certain bricks, like a car mobel, or a building, and place it anywhere you want, this would be good for several reasons
1. Good building, but town? just save the building
2.woops, made the building one to the side, save it, destroy, and replace it
3. make a good building and span it again and again!
this would be done with a "save wand", hit every brick to be saved! and hit it agin to unsave it
Also, if you hit a base plate, everything connected on it would also be saved