It seems that most of the decent LCD hoods/viewfinders attach to the camera via the tripod screw at the bottom. It also seems that these are not meant to be used either on a camera with an integrated grip (e.g., D4) or an accessory grip (e.g., D800 w/ MB-D12). Are there any LCD hoods/viewfinders out there that do work on cameras with a grip?
Further it seems that the follow focus/rig units that are out there also work with cameras that don't have a grip. It would seem, based on the pictures accompanying these rigs that the height of the camera with a grip would cause the follow focus unit to to align properly with the focus ring on the lens. Are there some that will work on a camera with a grip?