Features
Adds transport belt variants with built-in passthrough pipes. Pipe splitters are disabled by default, but can be enabled via setting.
Notes
Relies on the Things API to automatically place a "hidden", non-selectable and non-destructible fluid pipe in the same tile as the placed transport belt/underground/splitter, as well as handling automatic construction/deconstruction, undo/redo, etc functionality, as well as native support for Picker Dollies.
Mod Compatibility
Compatibility is not guaranteed out of the box, as the main copy code runs during the data stage, but can generally be made compatible by forcing the other mod to load before this one.
Tested compatibility with Bob's Logistics's basic/hyper/ultimate belts, and Planetaris: Arig's hyper belts.