Hi, the length of the undergroound belts is not affected by this mod. They are all to short (1/5/...). I changed the settings in mod option, but doesn´t change anything. WBR Marcus

I just tried it and it seems to be working for me! Are any of your other mod settings for Bob's Logistics different from the defaults?

Have a look in game at the tooltip for one of the underground belts. It should list in blue at the top all the mods that have modified it. Other than Base mod and Bob's Logistics mod, are there any other mods listed? It is possible that another mod may be changing it back.