My Canon 5D Mark 2 has fallen from my tripod head to the ground (approximately 4 foot), damaging the pins in the remote socket. The camera is insured but the policy has a £200 ($300 ish) excess charge, so i'm looking into alternative methods of firing the shutter. A wireless remote seemed like the obvious solution, but do any wireless remotes (RC-1, RC-5 or RC-6 etc) work from behind the camera ?