I was originally interested in adding compatibility for that mod, but have since stopped pursuing it. I love the mod, but the problem is with how loaders are implemented in the factorio engine. At least when I last tested, they can only load 1 item per lane per tick. 2 lanes x 60 ticks per second means loaders are capped at 120 items per second and there is nothing I can do to get around that. However miniloaders got around this by combining loaders with hidden inserters to get a throughput above 120 items per second. I would check out using miniloaders for getting loaders that work well with Ultimate Belts :) If the factorio devs update loaders to work at speeds higher than 120 items per second I'd be happy to look at adding support for Loader Redux.
https://mods.factorio.com/mod/miniloader
