Could the RnD engine be changed from requiring all levels to be in 3-digit format (000, 001, 002, etc... 999) to accepting anything that is a level file, and sorting the levels according to some convention - maybe the ASCII convention?
So you could have
001
001b
001c
001c multiplayer
002
002 alternate version
003
003 25/8/2018
etc.
This would make it way easier to manage levels, and test different versions of the same levels, and so on.
Alphabetical levels in RnD engine
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