Installing the Trackform Enduro Phone Mount on the handlebar extender and installing a
GoPro mount with spring loaded phone holder for a second phone.

 

The trackform enduor series motorcycle mount - short reach.  This thing is very well made, all metal and holds the phone in place quite well even without the rubber "phone net" included.
It includes some spacers for the handlebars.  These slip over the bar quite nicely.
Again I put some electrical tape on the handlebar extender to give it some rubber to clamp into.
The phone mount is all metal and splits in two pieces where it attaches to the handlebar rod.  Again I used some loctite on the threads.
Once in place it was ready to go.
The GoPro mount is pretty straight forward. 
I used some thick foam tape to give it some grip on the handlebar extender tube.
I eventually replaced the GoPro mount with another tracform enduro mount.