MemoryCarriage

A memory carriage has the advantages of both template and support carriages: it lets you select blocks as easily as support carriages, but does not sacrifice careful control over the pattern.

When placed and right-clicked with a screwdriver, it will flood-select blocks as does a support carriage: anything adjacent by a face, and not blacklisted or air. These blocks form the memory carriage's pattern, and are saved. The process is much like setting up a template carriage, except simpler: instead of building your object to be moved twice (once in template carriages and once in the final materials) you need only build it once, although it has to be in midair.

When moved, the memory carriage carries with it only the blocks that are part of its pattern, as a template carriage would.