I am currently working on an Ender 3 Pro Switchwire Conversion, using the Enderwire design from boubounokefalos. 

https://github.com/boubounokefalos/Ender_SW

After printing my printable version of the lower deck for the Enderwire, I had limited options for cable management due to restrictive measurements caused by the added height of the connectors for the lower deck. So, I designed and printed this cable raceway.

It is designed to fit the 4040 V-Slot Extrusion from the middle beam.

I also added a version for 2020 V-Slot Extrusion.

For me, PETG worked great, using recommended settings for VORON parts.