Thanlks for the suggestions. If I did go less $$, I'd opt for the type that do not have wings nuts z(XB).
Think I'll have to see it in person to understand how to reverse the center column; but thinking about it I may want to stick with one that has the horizontal feature, since I do shootfoliage etc. that's on the ground at times. One spec that I don't get is the "minimum height." For the 190XPROB is says: "3.3" (8.5 cm) [w/center column in horizontal position]."
Is this with the legs pushed all the way in the the horizontal plate pointed all the way down?