Longer Gimbal arm to mount camera housing

I was working on a variation of the Open Brushless Gimbal (http://www.thingiverse.com/thing:110731), as reworked by MikeyB for the Crossfire platform (http://www.thingiverse.com/thing:140126). I have the cheap Denver action cam, so I had actually printed the casing by toto99303 (http://www.thingiverse.com/thing:876614), when I found out that the designs of MikeyB and toto99303 weren't quite compatible: two screw mounts for the servo were opposite each other.

As I set out to remix, I got a bet