I'm solving it manually by adding the by-product processing to another product line, haven't used the percentages yet though.
Helmod i find useful to get a good overview of how many and what buildings i need to build to get to a result, its bad with by-products though i'm starting to want to treat by-products as something seperate from the main thing anyways, so not much of an issue anymore, there is a main production of plates then the by-products i think i'll just handle at a by-product site and use those plates (perhaps) for maybe just restocking player plate levels and not for other production, a use that isn't too taxing, and eventually use burners if the warehouses get full and deal with ashes in some way, maybe make it liquid and void it or gas and vent it, if i cannot find a use that would take a long time to produce a blockage.
I'm planning on using trains to export all the by-products to a by-product exclusive storage and "shipping place / warehouse" sort of thing.
Just exporting all the stuff that isn't essential to the things i'm doing at one location i think will make everything much more streamlined and easier to be built and planned.
Like my now third or fourth power station, i'm voiding all the tar instead of converting it to electricity because if i'm not using enough electricity, the tar would build up and produce a block and eventually shut the whole base factory down, a solution to this might be circuitry and valves but i think i rather just use the excess tar for much more useful applications than just more power, tho that means i'm pretty wasteful with my power production but i quadruppled my power production recently so i'm fine anyways, and i'm interested in more ways of making power than the basic: "water -> fawogae -> coal -> coal gas -> syngas -> combustion mix -> elecricity" conversion, also convert some coal to coke which is needed for the powerhouse so there is no coke overproduction in the power line, its not possible to get a power production block anymore because i'm voiding by-products... except for ash and iron oxide which i'm planning on having on a by-product export station.
It might be beautiful having a by-product processing site, no more messy by-products all over the place, just push it all to the by-product junkyard pretty much for very useful things
In short: having fun times with pyanodon's and i just saw the veritasium video on the 96,000,000 black balls after the video why that video got viral and they mentioned boron which comes from borax which is used in pyanodon and i just think how great modding and pyanodon is for factorio.
My factory is now close to 140h playtime, still haven't automated circuit production and i'm getting sick of building all the buildings and circuits manually and running all over the place for plates and wood and such. (need to move my lead plate production to my new plate production block, i also produce tracks at the lead production site, and wood).
So much to do, i'm pretty convinced i could probably play 1000 hours on this playthrough thanks to pyanodon's