I built a bone farm using graves but it also produces arrows. So I needed to separate the bones from the arrows. So I set up items ducts that would connect to a chest and an ender chest. I found out that there is filters for the items ducts so I made one and I've tried everything. No matter where I put the filter on thr route no matter if it is set to blacklist or whitelist and no matter if the filter is filled with bones or arrows. Every time all items(even items other than bones or arrows) will go right through the filter and into the first chest. Does anyone know how to actually use these filters because I can't find anything online explain how to use them properly. But I have a feeling they're just broken. Or better yet does anyone know if There is finally a working version of buildcraft for 1.12.2? I'm also playing on the revelation modpack. I wasn't sure if this was the right forum to post this question. None of them seems like the right place so sorry if this is wrong.