Footage I just shot using the Glock with BLDs on an AV200 gimbal:
https://www.youtube.com/watch?v=DjFDNTJ_Q_8
Shot with a Cannon 5D and long Canon EF 24-105mm f/4L IS USM Lens
reinforce the adapter plate
Did you reinforce the AV2 - Droidworx Adaptor Plate plate with the following:
100-1236 AV2 - DW Apaptor plate insert
Some guys added their own insert :
http://www.casimages.com/img.php?i=120113125213533299294106.jpg