How to add Collision Object Channels number limit? Again last question have no one reply

I need to be able to do collision and overlap events from one unit to another, but without using different collision object channels (e.g. if they are all pawn channels), it seems that can only do collision or overlap events, not both in different event
If there’s no way to do that, I’ll just have to add different collision channels to accommodate different collision states, carriers should collide some of the time and crush (overlap events) some of the time when interacting, how on earth am I going to achieve both of those things at the same time in the same collision channel?