Belts (and inserters) can only be placed facing north or east
Mods introducing new content into the game.
Augmented or new ways of transporting materials - belts, inserters, pipes!
... https://mods.factorio.com/mods/darkfrei/DontLeft
Thanks for the link, that is very similar. I haven't tried yours, but based on the description on your page I imagine the only difference is that mine has a few more configuration options and doesn't ban splitters.