YES!
- And if at all possible, please make this wireless - or at least with a *very* flexible (/thin) extendable cable. Think Steadicam.
How about use a velcro strap that allows you to strap the button around a pan handle, hand grip, or of course a gimble handle.
I've been using the Varizoom focus, iris, zoom control for my 100B mounted on their DV Rig Pro...many times during our last shoot, I thought it would be so nice to have the controls seperated on the two handles. Focus should be by itself on one handle! Iris and zoom on the other. And pay close attention to the ergonomics, which matter after a couple of hours of wearing the rig and riding focus. Also, on the focus...have a switch labeled micro and macro...I think the biggest issue with the remote focusing on the Varizoom is that it's not quite fine enough in certain situations....but then in others, I want to shift focus fairly quickly too...being able to quickly select the focus shift speed would be very appealing.
Summary....
Finer adjustments for focus.
Seperate control for focus on one handle.