Great Info Dave! Exactly what I've been looking for.

One thing that puzzles me. A macro step takes 1 unit of memory, but a Remap takes 4 units of memory.

Functionally, a 1-step could behave exactly the same as a Remap (ie the first step of the macro would be to press the key you want remapped, and then the macro ends).

I wonder if this is a good way of doing the same thing, but only using 1/4 the memory?

Alternatively, perhaps Macros take 4 units of memory for a macro of between 1-4 steps, and then 1 unit of memory for each additional step? This could be verified by finding out if more than 45 2-3 step macros could fit in the remote.