Hi Ben_R, First of all, thank you very much indeed for your excellent review of Gitzo Tripod & Markins head - the quick release clamp is the part I got slightly stuck on. I have Pentax but will be getting Nikon camera soon and I am trying to decide how to solve the plate & clamp issues. Does the Markins ballhead come with plates and are some of them quick release ones as well but somehow not adequate or precise enough for the job hence you replaced them with RRS clamp? I understand you buy the plate separately? You have Cannon so this clamp is right for you but it will be a different one for me? and then the matching plates for each camera I suppose? I realize I stumbled upon Cannon forum but since you have such incredible advice, maybe you have some tips for me as well I am new to this plate & clamp setup idea, so far I have gone with "what was there" - the easy options, but want to improve my setup... I plan to do a lot of panoramic shots as well and I am guessing I will need a panoramic clamp for that - that's another question as well. Best, Maya