Needed to position a WIFI Camera a distance from the 3D printer and wanted to make sure I could change it around later. I also wanted to use CPVC because it is small, cheap and I could rout the wire internally. I designed a simple 20mm rail attachment that would support CPVC pipe and then I needed to design the camera to CPVC interchange. Finally I designed a simple inline box to house the board with the wire connections (have to cut the USB end off to route wire through pipe).
Also check out my Raspberry Pi 40mm Rail Mount pictured here:
https://www.thingiverse.com/thing:4797825

Creality

Ender 3 Pro

No

Yes

.20

20%

-Press fit the pieces (Don't glue) and you can change configuration around later.
-Support was used only for the 20mm Rail mount.
-The camera-to-CPVC mount was made for a cheap Levinist brand WIFI camera I got off Amazon (https://www.amazon.com/gp/product/B08PVDMX2Q/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1)