I hate to beat a dead horse, and maybe this belongs in the Mod section... but I will. I'm so close!

Tried to mod the E_D_Building file to leave only one slot available for catapults, artillery, etc. as per RickooClan's suggestion above. I see that the numbers after "Recruit_Pool" for catapults are pretty much as follows-
1, 0.4, 3, 0.

I assumed that the "3" stands for three slots available, so I changed them all to 1. I'm still getting multiple catapult slots available in my campaign though, at least for my faction. I also notice that "recruitment_slots" only appears under castles where catapults/artillery aren't listed. When you reach the catapult area of the file there's no recruitment slots line.

If someone could help me out with this or point me to a thread that can, I'd appreciate it.

Thanks