Printed using the new Bambu Labs PETG-HF, I also scaled down to 65% as that fit my beach chairs with a beach towel. The print-in-place works great, just make sure you orient the print with the round spring against the print plate otherwise you'll get a floating error. No supports are required.
The author remixed this model.
Only difference is a stronger spring/clamp, other than that it is a great towel clamp.