Hi.
Would it be possible to fix the unlocking of the quality levels? At first I thought that the problem was caused by the Upcycler Mod, which I also have installed, but with the help of my save game, he found out that there is a lot mixed up in your mod.
Here is the link to the conversation with the Upcycler Mod author: https://mods.factorio.com/mod/upcycler/discussion/679cdc52f188d8d69ff57f0b

Hello!
Actually, i initially created my mod just for myself and i did not expect that my mod will get any popularity)
But ok) I will try to find the problem

I found the problem, well, not one actually :D, and what is really funny is that none of them is related to this thread.
Actually this issue exists because of the conflicting changes to the tech tree.
My mod changing tech tree in the way that you need to research quality module technologies to unlock qualities:
quality-module1 -> normal+
quality-module2 -> uncommon and uncommon+
quality-module3 -> rare and rare+
Aditionally i changed the prerequisite for epic quality technology from quality module 1 to quality module 3
Changes made by author of upcycler are hiding quality module 2 and quality module 3 technologies so you can't unlock new qualities with my mod
So looks like our mods just can't work together without adapting

Upd: Looks like if you change property "Disable modules with quality" to false in settings, it could work

I decided to change my mod by making compeletely separe technologies for uncommon and rare qualities. I will insert them inside quality research branch between quality module 1 and epic quality. I think it should fix your problem and will make quality research more clear.
Wait for version 0.2

ok

Done. Don't forget about "Ultimate Quality in Space Age" mod if you playing with Space Age :)

Yup. Now I know.