Funny timing, this thread!
I found my set-up to be lacking on eclipse day...I'd tighten everything down, then the camera/lens would droop a bit. When shooting telephoto, that took the image right out of the frame. I thought I'd update and found out that nowadays, one much purchase the "legs", a head, a plate for the camera, and a clamp to join the head and plate together!
Plate came over the weekend, head and clamp showed up today.
Seems, the older I get, the more I find out I don't know.