Retractable landing gear with shock absorber

A set of retractable landing gear with shock absorbers made for a quadcopter project. The shocks have adjustable pre-loading and are quite strong. The bracket is designed to fit a 14mm tube, Turnigy Talon v2 compatible. I use the same brackets to mount battery cages, electronics, and just about everything else on my quad. See instructions for assembly and required materials.

######update:
Uploaded the feet for the shock. just a simple post for now.