what of the issue I'm pretty sure I've seen of combinations of certain orders of some carts causing problems on their own even in quality fully functioning mulitsloot hardware?
so like if 3 stops working when cart x is in there among the others swap it out with cart y in slot 1,2,or 4?
I'm pretty sure I've seen it said that this is a possible legitamate solution. Easy! too.
good lucks!