The "Circle K" is the supermarket our heros are standing in front of when Rufus and their older selves arrive.
Like you, I will make sure the user never actually gets that many units to build, although I will take it one step further in TD:SE: I'll take out 4 countries in the process, allowing for each of the sides to have roughly 33 units of each type. Given that each side consists of only two countries, each side could have an army of about 15 unique units in it's roster. As far as I'm concerned, there are 15 buildable Allied units in the VehicleTypes list. One of them is the unique Tank Destroyer, and this includes ships. Which means that each of my human countries could theoretically have as many unique VehicleTypes for itself as all five Allied countries together have in their army right now. In other words: Although TD:SE will limit the amount of units you can get via takeovers and spying, and although I'm killing 40% of the countries, TD:SE will still have more variation in units than the original game ever had.
(of course these 33/15 units are theoretical - on one hand, units like harvesters and MCVs are needed only once per side, freeing up units, on the other hand I will need VehicleTypes for certain "special effects"...)
About the aid chopper...no, thanks
Since it'll be of no practical use to me, I'll rather wait to see it in action in your mod
About your IEs: Are you using pd's patch? Even though it seems unlikely, they could still be related to the bug fixed for the next release. Not probable, but possible.
Damn. Almost 5 AM again. I swear, when school starts again, my day-night-rhythm will be all fucked up.