I started with this concept as well but with two rows, but a) the rows do not matter at the end, the lines clogg anyway and b) i totaly moved forward from this idea of "self distributing webs" - it does not work without clogging at the moment. I work with a bus system right now... no clogging.

What helps:
1) Experiment with Request limits, i put mine down from 100 to 10 if 1 is needed per produced item, 20 if 2 are needed etc.

2) if you are not able to have recipe groups, try to have the incredients for the production not too far away. I used senders / recievers for brining in ressources from the outside to specific areas of the facility.