I'm surprised nobody has yet requested this. So, as the title says, stackable print plates. This is easily possible: I looked at the code of a mod, and I learned that just add new print flats just like the ones we have now and add "stackable" to their name, and the letters in their BLB would be b. For instance, 1x1 plate: b. 1x2 plate: bb. Got the idea? Now just make it a datablock and turn it into a new block and release it. I'm just lazy.
