Belt speeds are a 2^N progression being 1,2,4,8. Belt costs adjusted.
Mods introducing new content into the game.
Augmented or new ways of transporting materials - belts, inserters, pipes!
https://drive.google.com/file/d/1m8gegk6ROYgwJijjW_2gyHoiLv039LGh/view?usp=sharing
to separate speed levels is not 1,2,4,8 , but 1,2,4,6,8 (for more complete support of mods using Bob's logistic)
