I had a setup with a production area (EE stuff) pulling a ton of various items out of condensers and pumping them in a high speed tube over to a storage area. I needed solar panels for my tube accelerator, and then for the sorting machine on the storage end. I added enough types of items to need two storage machines, and ran them in parallel. Each sorting machine would only accept it's type of items, so they didn't steal from each other. It was also controlled with no un-sorted items entering the line, so I didn't need a default route. I reworked it later to make the existing input filters color code things. I got rid of the sorting machines and their solar panels by doing so.
I've used every color tube, so if I add on to the setup, I'll have to add some filters on the storage end to reroute the new items to a second bank of chests. (If I was still using sorting machines, the sorters could either be used with a default route set up, or in parallel with only certain items accepted).
Making the sorting machines work was trivial compared to what I had to do to keep things from overflowing and backfilling my production area.