I want to use PVC, but mounted in a sturdy fashion. Finally, came across clips which look to be what I want. Now I need to see if you can cut 45 degrees out of a pipe with a table saw, so you can slide the wires in and out.

https://www.pexsuperstore.com/pex-a...

Update:

Looks like those 1/2 clips will not stay on 1/2 pvc. I'll try 3/4 someday.