Yes, I have the CleySpy version permanently attached to my birding tripod, used mostly for my spotting scope but also there to support my camera. It really is the easiest most comfortable way to carry a tripod around, even with my scope attached. There are just two bad points.
Firstly, it really ruins stability when it's windy. That's not too much of a problem with the scope as the brain is very good at smoothing out the wobbles. But it can be a real pain when using the camera. 'Why not just remove it for shooting?' I hear you ask. Well, that's bad point No. 2 - it's not very simple to put on and take off. That's why it's on my birding tripod permanently. And that's why I have a birding tripod, as well as an ordinary (heavier, sturdier) tripod for use when I'm not trekking miles with my scope and camera.