The memory Chest allows you to middle click slots to lock them to that item type. I would love the same functionality on the memory cards used in handy chest and handy bag. As it is I spend a fair amount of time setting up my handy bag to have one of every ore in it so that when I go mining it will pick-up matching. When I come home from mining I put my memory card in a handy chest with a pipe on it to empty the memory card. The pipe removes everything from the memory card and when it is time to go mining again I have to pre-load a single ore in each slot. Would love lock the slot so that after the pipe pumps everything out the handy bag still knows that slot is that ore and picks it up despite having zero of the ore.