Backpack clip for 25mm diam tripod/monopod/whatever tube.
Based on videopixil's design (http://www.thingiverse.com/thing:23742) but enlarged to it a 25mm strap such as Molle straps (his could only fit a 18mm strap).
Strap width: 25mm
Total clip height: 37mm
Inner diameter: 24,5mm (fits a 25mm tube)
Note: Might require support
Just printed the clip and tested it on a Manfrotto 190XB tripod.
Clips quite well around the tube, with enough strenght.
Adaptation for Molle straps in preparation !