So this is point where factories reach 300% quality with full set of legendary modules.
Steel (Foundry, 4 modules) - 15 levels
LDS (Foundry, 4 modules) - 15 levels
Scrap (Recycler) - 30 levels - it can't have productivity modules.
Blue chips (EM plants, 5 modules) - 12 levels for 295% productivity.
Plastic (Cryogenic plants, 8 modules) - 10 levels
Rocket fuel (Cryogenic plants, 8 modules) - 10 levels
Asteroids (Asteroid crusher, 2 modules) - 25 levels
Rocket parts (Rocket silo, 4) - 20 levels.
Cost of replacing single module with speed module requires spending of 2.5 levels of repeatable research, if you are using legendary modules to maintain 300% productivity.
If you spend enough on repeatables, then you can replace them all with legendary speed 3 modules.
Steel (Foundry, 4 modules) - 25 levels
LDS (Foundry, 4 modules) - 25 levels
Scrap (Recycler) - 30 levels - it can't have productivity modules.
Blue chips (EM plants, 5 modules) - 25 levels
Plastic (Cryogenic plants, 8 modules) - 30 levels
Rocket fuel (Cryogenic plants, 8 modules) - 30 levels
Asteroids (Asteroid crusher, 2 modules) - 30 levels
Rocket parts (Rocket silo, 4) - 30 levels.