I was messing about in my observatory today and found that the screws that fix the legs to the tripod head were quite loose. I presume this is because they are supposed to be flexible for when you move the legs. But there was a fair amount of play in them, so I tightened them up for good measure (since it isn't moving anywhere soon).
They're the hex screws at the bottom of the pic, two per leg.
When you consider how much weight is sitting on top of that tripod, you don't want any movement at all ;-)
