This mod adds an additional five tiers of belts to the game, beyond what is currently available from other mods. The fastest belt in this mod is equivalent to 6 express belts.
Inserters have a rotational speed. They cannot pickup items from belts that move faster than their rotational speed. This is an intentional limitation in vanilla Factorio and not something I intend to do anything about. You'll just have to be creative about how you plan out your factory! Use splitters and split off to a slower belt, use a mod that adds loaders, or create a setup where back-filling is fine.
