Does anyone use this system. I've heard that they had some gimble problems but that is supposed to have been fixed?

Here is the forum. You can ask Pascal who owns the rig. He has redone the sled and is reworking the arm. He's done a fantastic job. He's also present on the HBS site.

which forum are you talking about?

I'm sorry. I forgot to post the link. Dumb of me:

Basson forum: http://bassonsteadyforum.sytes.net/