signs for the sorting? all the chests have an item frame with the item on it and the input chest is signed. not sure what the issue is there unless you removed entities?
As for the mine idea i actually have that on my survival version i will work on making that version available tonight.
Schematic #13122 on February 6th, 2019 02:51 AM EST
yes it is, the cart is filled by hoppers as It slowly falls through it,
you could make one with a detector rail with a delay leading to a unpowered 'powered rail' the delay would need to be long enough for the hopper(s) to fill the cart, but it wouldn't be quite as efficient.
32 auto-fill furnaces on June 5th, 2016 08:34 PM EST