This is for the Brillar series of LED strips commonly sold in Australian retailers. I have found that the remotes that came for these never had a wall mount or any way to mount them very effectively. A few iterations and a little design time later and I have this design that works well.
Printing wise:
I used a brim on my older printer but on my new direct drives found that I didn't need one.
No infill is needed and I personally printed the final versions at 0.2 as they were getting puttied and sprayed.

*** Revisions
V1.0 – Original concept design, no real success in this other than establishing absolute failure.
V1.1 – Increased opening distance and added some branding. No easy way to attach to wall other than double sided tape. Didn’t print well 40% of the time in testing.
V1.2 – Useable results achieved after adding a backing, changing from sketch extrude to a extrude shell idea. This worked for the project and the images are based on this. Some failures and minor print issues.
V1.3 – Updated Clearances and added mouse ears to make easier to print well at high speed. Increased the opening width slightly to allow for minor over extrusion.

Anycubic

i3 Mega S/Pro

No

No

0.2

N/A

Addition of Mouse ears has meant this prints easier without a brim.
This might need a brim on some machines. I have printed a few of these with my Mega and Kobra. The ones pictured were off an un-tuned Mega and came out functional.

Images showing steps on my FB Page
https://www.facebook.com/khalmdownhobbies/posts/152235677577856
Essentially I measured it up as an idea. Started iterating in onshape and ended up with this as a reasonable design.