Features

Quality modules inspired by FFF-375, but very janky!

Quality modules as items. Can't be placed directly in machines. Use module to drag around relevant machines to insert, right click drag to remove.
Various crafting machine variations with baked-in quality modules. For use with bots, assemblers can craft these from base machine and modules.
Quality upgrades for many items, inspired by the FFF.
Recycling according to FFF.
Deleveling turns quality items into several normal items. Useful for utilizing quality science.

Compatibility

Show programming baked machines from base and module on player - Unneeded with selection tool.
Enabled/disable additional quality bonuses not in the FFF - Reasonable upgrades like lamp range and fuel values.
Extra quality bonuses string - A simple way to add extra quality bonuses. See source homepage for details.
Recycling efficiency - Portion of ingredients of items returned by the recycler. Default: 0.25.
Alternate item quality icon position - Moves the quality icon to the top left, so it is more visible on compacted belts.
No quality on item/subgroup/group - Used for compatibility with mods.

Show quality only in certain proximity - Used in megabases where performance suffers due to overlay count
Tick rate for updating proximity overlays - Used in conjunction with the above to aid performance.

This mod has a modding interface, for simple addition of new quality bonuses. See source code page for more details.

Quality production works with probability recipes. Results can sometimes disappear or output several items. In large quantities this averages out.
Researching all technologies (/cheat) is slow. This is an engine issue.
Quality indicators do not appear on ghosts or GUIs.
Some quality indicators look strange on recipes and equipment.
Mining drills do not get the bonuses from the FFF.