@thebird - I have a large sorting system hooked up to 120 chests. Most of the materials coming from Quarries is Sand, Dirt, Cobble, Gravel and Flint so instead of sending them through all my sorting machines just to decide they need to be recycled they are taken out of a black ender chest separately. Basically, my entire system runs from a black ender chest. Dust, ingots, raw mats etc all go into it and go to the relevant machine rooms based on what type of item it is. It even goes as far as sending 25% of coal to turn to glass, 25% for Silicon Boules and the rest for storage. It's a very complex system that I have designed to run as many quarries as possible. Efficiency in this case is everything.
@N7Havk - I google'd for that but came up empty. What is it?
p.s I do have the system working perfectly now utilising BC to exclude these items.