The only thing I don't like about tha Cavision 3x3 matte box are the filter holders. The rest is very nice and looks and works well.

However, the filter holders are very tacky in the way they hold the filter. The groove on the bottom is too narrow for the Tiffen filters (and I would imagine all glass filters). So the filter sits on the top of the groove with just a small spring holding it.

I haven't lost a filter yet (I use filters 95% of the time), however I am never happy with it.

The only other limitation is the lack of availability of side shades. Not that big an issue. And you could always use a real French flag (on a flexible arm).

autofocus
 

I just ordered the setup you described in your post. After ordering and taking a closer look at your excellent photos, I noticed the matte box and rods block the port at the bottom front of the camera. Is this where the autofocus system is located? If so, how does this affect the autofocus? If it completely disables autofocus, what method do use to achieve the best focus?

Thanks,

Michael