This is the way.

Pi-hole can run inside a docker container no problem. In fact I have it running on my unraid server that way.

Then your ambient air while printing is too cold. You need a chamber with >40°C

Pi-hole. Get rid of at least some ads on the network level. Maybe add unbound for a faster DNS response.

Very tidy!

In the picture is no tube going to the toolhead. The white line you see is the filament. The Bowden tube is only connected to the frame. That means that every time the toolhead moves to either side, it will tug on the filament. potentially creating artifacts in the print and maybe even causing underextrusion and slipping extruder gears.

I am a bit sad that polyholes didn’t really catch on. They would have solved that problem: https://hydraraptor.blogspot.com/2011/02/polyholes.html?m=1

:(

He wanted it to be tidy though…

Yes, that will cause problems. Don’t attach it to the frame. Attach it directly to the toolhead.

Lots of people have moved away from raid entirely because of some of these issues. There are alternatives these days. For example mergerfs or the ZFS file system.