I just had a look at belt sorter, and it looks like Judos is using some functions to create the belt sorters. I've not taken the time to learn lua very well, so I'm not sure that I can actually add them myself. Also, I could possibly make the graphics, but it would be quite time consuming.
So my verdict: I can't add them because I don't have the lua skill. However, if anyone knows how to do it, and will send me the code, I will happily add it to Ultimate Belts! :) Probably only the first two tiers of Ultimate Belts though, since at this point in time Factorio doesn't play nicely with belt speeds greater than 120 items per second.
