(If you make one, please upload a make! it is very much appreciated! Thank You.)
Vivofit Jr replacement strap holder!
Pretty self explanatory!
walls are 0.8mm thick for a 2 pass print with 0.4mm nozzles.
I've printed this in 0.2mm & 0.1mm layers, both coming out quite nicely.
I did use 2 small lines of supports for the nib in the middle, but that may not even be necessary.
Printed with TPU & works fantastically!