Update 2/27/2015 - Added yet ANOTHER mounting option. The new files are called "Pivoting arm" and "Pivoting phone holder". This newest setup still attaches to the current handlebar clamp, but the phone holder connects to the mounting arm with a countersunk socket-head screw, and tension is maintained on the back with a spring, washer, and lock nut. The bolt is a 1/4"-20 unc x 1.5 "long. The spring max OD will be 0.458", min ID will be .250", and length should be around .750".Updated to include a second and third phone mounting option. The new files are one-piece phone holders with a pass through for the camera and flash. One is for landscape viewing, and the other is for landscape or portrait mountingclam-shell type holder for a OnePlus One phone. I'd suggest printing with supports, but it may not be necessary. Print at 50% fill or more.