Needed a ledstrip mount, found some on internet. They where all a bit meh.
So made my own.
They work pretty good, you can even clip cables under them.
I was not sure about the orientation of the print, made some sidewalls to hold the small part in place. Printed 24 of them without issues on mk3s with thin wall detection on.

Print instructions

I have not tried printing it other than using thinwalls.
But probably will print fine up-side-down.