Back in the day, I came across a mod on a server that made underground belt entities very cheap, and then used 1 overground belt for every underground tile you wanted the belt to travel. There was no limit to how far you could extend underground belts, either. It was a brilliant idea, very much like the 'Piecewise Undergrounds' pipes mod, but I haven't been able to find it since. Are you familiar with it, and if so, can you add it--and PU--to this pack?

Hm, that sounds a lot like BeltLayer, which apparently had a 2.0/Space Age counterpart, but was at some point deprecated (likely due to all the runtime issues reported in the discussion threads)

I could take a look at updating it, but I personally try to avoid runtime mods (with this Picker mod being one of the few that runs almost entirely during runtime; this was a massive undertaking on its own)

EDIT: Yeah, I took one look at the code and I'm immediately backing out of that one lol. Hopefully, the Piecewise Undergrounds dev can figure out any remaining bugs with that mod so they can release the belts update mentioned in the description

Fair enough. Thank you for taking a look at it, anyways.