Known issues:

Q: I can't use block picker to quickly equip modded belts(fixed in 0.0.3)
A: Yes, this is because modded belts is complete different entity prototypes. Game can't compare them to vanilla one's.

Q: Why sometimes conveyor belt/underground conveyor belt/splitter doesn't change stats?(fixed in 0.0.3)
A: This is because mod tracks last held in cursor stack's quality. When You placing last item in stack, quality disappears and script returning nil, so game won't change anything.

Q: Is this mod compatible with additional quality mods or old quality rework mods?
A: Theoretically, Yes. Mod scanning quality list on startup and creating entity prototypes for every quality. So you able to add quality mods and it should work.

Q: Is there support for modded conveyors?
A: Currently - Yes, partially. Some mod add loaders, some of them are compatible in  "out of box" state, but some of them need to be worked on to work. Conveyors/underground conveyors/splitters functionality implemented and most likely will not cause any errors.

If you encountered bug/crash/broken functionality etc. please create a post in 'Discussion' tab with any info, related to issue.
Also you are welcome to post any suggestions!