Hi guys, thanks for all the help so far, I think I need to give a few more details
It's not to hold a camera at all, it's for an outdoor microphone system like this one:
It is designed to be left outside for hours/days, so needs to be sturdy and secure. I've tried a few with heads like the one shown in the photo and because there is quite a lot of weight in the microphone part they 'wobble' quite a lot as they are quite flimsy.
I'm looking for something sturdy and robust over light weight really. In fact heavy might be an advantage, as would a way to anchor it to the floor?
Does that help any?
Thanks for the help so far, it's really useful.
G