Suggestion grab belt speeds from data on world load (could lag if you had LOTS of belt types)
you could try something like this (this code need a lot of work)
This is psudo-code
for item in data do
if item.type == "transport-belt" then
speed = item.speed * 800
name = item.name
end
end
***
Don't know why belt speeds are recorded at 1/800 of the actual speed in items per sec.
I have no clue on how to grab the localized name

A good suggestion, I’d rather do that than use the hard-coded values I’m doing now. Will look into this after I get back from vacation.

hope you have better luck than I.

What’s a mod to test with?

bob's logistics has about 5 diffrent belts and over wrote the vannila belts.

It would also be nice to support modded inserters, though inserters are a lot more complicated and would require some serious thought.

I've updated the mod to handle these modded belts. As you say @alercah, modded inserters are too hard for me at the moment