Originally Posted by
Abu Mahendra
...or, if you can find the parts, you could look for a Kickflix caddy to mount on the seatpost...
The Klickfix caddy and bag/rack mounts are solid, withstanding the roughest of shakes and shudders, yet easy to mount and dismount. Recommended.
The handlebar mount is secured only with zip ties?

wont it rotate under load? (The seatpost mount looks good.)