I looked at the Marc system and it seemed a good solution to a problem. What I don't understand is why you don't use a sizing station before putting the pallets away in the warehouse? It's a standard procedure with an AS/RS because you can't climb up 60' to rectify a pallet problem. Yes it slows things down a bit but taking into account the time and potential problems you are having I think it is a better solution. For anybody wandering what I am talking about it a length of Power Conveyor with a metal surround that the pallet has to go through in the middle. Load at one end and unload at the other. If the pallet is the right height and width it passes through, if not it is rejected for repacking. I don't know what the approved procedure is for unstable pallets, but what i would do if i could track who put it away and it caused a bottleneck, is charge that driver a penalty for the clearing. The correct procedure would be to put it into a shrink wrap lane. I just think the solution is to input correct pallets and you won't have these downstream problems?