Hello, I've been using this simple new belt mod that adds 3 new belts, to avoid getting too deep with bob´s mods or adding 10 tiers, i wanted to keep it simple, but it doesn't follow the doubling rule.
MOD: Advanced Belts by Warnone.
Link: https://mods.factorio.com/mod/AdvancedBelts

Thanks!

edit (11 month after): Thanks a lot!! im gonna get back to Modding thanks to this (and you), and also Hype for the expansion.

Only took 11 months but Advanced Belts should now be supported. I am not responsible for any issues that come from the last tier having a speed of 480 items/s.

Thanks Soggs!