To see through the 'analysis paralysis' it can help to list each of the factors you consider important for your intended application and compare the different tripod designs for stability, weight, cost, ease of use etc. Give each factor a score and add them up.
Nickl that sounds complicated, and a bit too scientific for me. Fortunately I have a simple practical test that works well with my equipment. The sherry glass test. Set the camera up outside, on its tripod. Attach the cable release and cock the shutter. Then fill a sherry glass with water and place it on the camera, preferably on top of the front standard. If this is impossible to do with a glass, use a flat screw top tin lid. Then take hold of the cable release, fire the shutter and watch to see if any ripples appear in the water.
My tripod is a carbon fibre Manfrotto 441, and the head is a very stable ball and socket. When I do this test with my home-made lightweight 5x4 camera , fitted with a 203mm Kodak Ektar, I get absolutely no ripples. But the same test done with my Shen Hao camera fitted with a 210mm Apo SYmmar lens, shows up real problems. If there is even a slight breeze, the water ripples all the time, even when I'm not touching it. Just picking up the cable release caused ripples. These increase when the shutter is fired.
So why not just use my home-made camera? Well, I actually prefer to use the Apo Symmar. The controls are easier to see. But it is too big to fit on my small home-made camera.
If the Shen Hao was fitted to a wide topped tripod, without a head -which is what we have been talking about- it would be more stable. Alternately I could make a very stable home-made wooden camera to fit on home-made tripod legs with a wide top unit. The camera would rotate. To get it to point up or down the tripod legs would have to be adjusted. My original question was, how easy is this to do?
So far I've had a few answers which seem to vary from "fairly easy" to "not very easy". So I'm still undecided about what approach to take.