Thanks for the info Andy , I might just keep with what I've got & look to upgrade the gimbal arrangement if I decide to upgrade my quad too !
Saw a friend of mine in tescos last night who works for a filming company here in Suffolk , he's a pro 3D heli flyer & now flies a octocopter for Doozee!
Check this out !
http://vimeo.com/m/71245794
He's the one sat on the back of the convertible car !