The discussion in Neil Poulsen's thread about the weight-bearing capacity of particular tripod heads brought up the question of what experiences people have had with quick releases on LF cameras, and what design features would make for a secure QR for different sizes and types of LF camera. As I said in the other thread, I've been skeptical of QR's for big cameras, but I could well be missing something. I'd be interested to hear of others' experiences with QR's for LF cameras.