CRYAC Kill Grade video inspired me to design a kill grade assistant.
In setup of the game you put the yellow pegs on the backside in the corresponding breakpoint for kill grade.   For a 9 operative team that would be 2 4 5 7 and 9 because those are the breakpoints for 9 operative team in this example. You slide the red window down to the 0 at the start of the game and slide it up as you get each kill.  That way you aren't trying to count your opponents models and look at the kill grade chart mid game every time you forget and need to know the kill grade.  In this example you can see that if you have 4 kills you can just glance down and see its very easy to move up a grade by getting just 1 more kill.

Once its printed it maybe a little hard to slide the window or put in the pegs.  But after you slide the window or put in the pegs a few times they will go in and slide easier.  This is intentional as everything is friction hold.