Small Epoch Build Dupe

Hey not sure if this has been posted, but i haven't seen it pop up in any threads since i found out this was possible.
So excuse me if everyone already knows this but hey, where's the harm right?
Its pretty simple When you are placing down say a wall or a door on the latest epoch, i noticed that if you drop that same item as you are in the process of building it you will not only continue to build but you will have the original item :O
Bam that easy!!

*note i haven't tested this thoroughly but it seems to work on most/if not all occasions.

Cheers!