I already have 3 barrels full of scrap
i'll be fine! but as you were saying, i can just hook up ass tons of barrels to this system and it will find a barrel for each item?
Basically. You might want to manually put one item in each Barrel, so you actually know where stuff will end up, but yeah. The RP Tubes are inventory aware, and they detect the Barrels as inventories, so they'll automatically put stuff in them. RP tubes look for the closest valid inventory; if a Barrel exists with a particular item in it, it's a valid inventory for that item. You will probably want to put a Restriction Tube on the final chest, so it is ensured to use it as a last resort. On my world with my gf, all of our Barrels are in what amounts to a big U shape. We have a section of Barrels for Metals and Gems, Mob Drops, ThaumCraft Resources, Blocks, Food, Plants, and Wood. Anything that goes in our Ender Chest gets sent to its Barrel, if one exists. If not, it goes to the other end of the U, where the overflow chest is. Any unrefined Ores will end up here, along with any other random crap we find. At that end of the U we have our processing room, where any ores will be refined and the output gets put back into the Ender Chest to put it away. There's a Gold Chest by each section of barrels, unconnected to the Tube system, for anything that goes there, but we don't have large enough quantities of to really justify a Barrel.