Backpack Hanger for Closet Rod

Backpack hanger that fits ~35mm curtain hangar rod in closets.  Based on the excellent model from Douglas Hale that is linked.

This was the best design I found for a backpack hanger after printing and testing many. I then wanted to also create a dual hook version, however it does not print as easily because it requires supports.

The 3mf file includes the original single hook as well as the modified dual hook version.

Printed them in both PLA and PETG with the included process settings to be extremely strong. 

Can scale in y-axis to shorten.

Scale x/y/z by -5% for a tighter fit on US 1.25" curtain rod.  It also works fine as drawn.