It does not use nor output perfect number, may have more copper cable assembly than needed but it's space efficient while keeping all four green circuit running full speed. Two out of three copper cable assembly are working full speed for each green circuit assembly. By repeating the bluprint up and down you can save on beacon and module cost.
Here a screenshot of production screen while this is working :
As you can see it use more than 1 blue belt of copper on each side (42.5 unit) so you need to bring more than a belt but for those who don't want it will sitll work quite good without the 2.5 more copper). Same problem with the iron, it consule 46.6 iron/s.
blueprint string
Let me know what you think of it and post improvement if you think it can be improved.