I just added a iOptron mini-pier to my tripod. If you have a long refractor and always worry about it hitting the tripod, you might want to think about this. It’s surprisingly light and seems pretty stiff. It’s especially good for astrophotography since you’re often not around to make sure the camera and accessories don’t hit the tripod during meridian flips and when moving from target to target. I’m happy with it so far, and it solves a problem I’ve had for a while.