I was fairly sure from looking at the mount that it worked exactly the same as my alt-az on a wedge. Basically the RA axis is polar aligned then through tracking it only rotates on the RA axis. That was the geometry I had in my head.
What I'm impressed with is 120secs of smooth enough rotation from such a small head and light weight tripod with that setup on it. I had gym weights and everything on mine to smooth out the vibrations. The big advantage you have over mine is the counterweight.
I'm really impressed Tony
