Originally posted by Ben_Edict suggest to go into shops and try these in situ, before buying.
Ben makes a fine point,most of those folks more than happy to help work it out.
Have gitzo 1340 & manfroto 393 used for my 2 largest lens,weighs a ton and
looks rather "industrial",very solid and gives great peace of mind.
Have a TLR that Ive tried with 2 lens sets reversed to one another and a focusing rail.
Would love to find something a bit less substantial and still capable of bearing the
weight and allowing low profile at same time.Ballhead is my biggest worry.