Whether or not they are capable of interacting w/ chests/assemblers is less important to me.
As for filtering, I think they should be the same as splitters in that regard. Right now imo there isn't an elegant filtering solution that doesn't bottleneck throughput, for better or for worse.
Agreed that UG do seem a bit hackish for this purpose. Same for how they compress better than regular belts.nemostein wrote: The only logistics related item that I wanted implemented was a real lane splitter (I really hate that underground belt ugly hack).
But now I wish for 2 things, this and loaders...