Not a daft question! Yes, you have to roll your own custom version of anduril.
You will have to recompile the firmware with #define START_AT_MEMORIZED_LEVEL in your anduril.h file and the tail button will turn the light on at the memorized level.
I’d like to add a different type of tactical mode to anduril where I can swap between a START_AT_CEILING_LEVEL and START_AT_MEMORIZED_LEVEL, but that will take a bit more time.