Looking at your systems tray, I cannot see anything that it holds more with regard to different counters than mine except 3 things:
- German concealment / CX counters
- Tons of acquisition counters
- some non-MMP system counters in one subdivision
I store Concealment and Acquisition by nationality colors and pick what I need before scenario start to go into the side tray.
On the other hand, it seems, that my main systems tray appears to hold some things yours does not (as far as I can discern):
- Fixed CA for MG/Guns
- Climbing
- Steeple, Fortifications, Cellar
- HD
- Bog
As these 8 inserts sit in the top tier of one RAACO Assorter, this is pretty much the same with regard to desk-space as your box lid but being a bit more orderly and seemingly holding a bit more variety of counters directly accessible.
Of course, the "ultimate" storage solution is a matter of personal preference in the end.
von Marwitz