I would like to be able to set a storage unit to only accept a specific shape/color combination and have it reject anything else just as it does when it has an item in it. the problem is that when it empties out, it will allow anything else in... and sometimes that is the wrong item and then that storage locks out all the right items.... or worse, it looks like everything is fine while it keeps letting the wrong items through and it takes a longer time for you to notice something went wrong. even if I couldn't set it manually, at least let a storage unit have "memory" of the last unit in it an keep that restriction until the player hits clear/reset.

I would also want the freight hub silos to work the same way... it is brutal when the wrong item accidentally winds up in your freight hub and then that error gets distributed throughout your whole world... it can take hours to fix. (I say this from first hand experience :( )