(I hope the links and images come through)
I got the idea for this off board artillery tray from Davies Super Channel YouTube page:
YouTube link
Yes, I know that the models in my tray are AT Guns, but it's what I had available.
This helps me keep track of all the thresholds and modifiers for Requesting a Fire Mission (FM) and the follow-on Attack. The bottom part of the tray provides space for tracking two artillery batteries and one airstrike (or a third battery).
The black dice represent the number of artillery strikes purchased for each battery. The white dice represent the threshold for the FM Request and the Attack for each battery. The red dice represent negative modifiers, and the green dice positive modifiers.
So, in the photo below, I have purchased two artillery strikes with the first battery, and one for the second. For the first battery, the threshold for the FM Request is 6. There is a -1 modifier for the radio equipment for the spotter, and he has tried to make contact for two turns without moving for a +2 modifier. Assuming in this case I made my FM Request roll, I have a threshold of 8 to hit the designated target. Below shows that I took 3 turns to range in for a +3 modifier.
The bottom part of the tray that organizes the dice is made of matt board and lifts out. I made this for Gear Krieg, but this could be used for any game where you have to track a bunch of dice and various modifiers.
link