I managed to get almost straight down tilt with stock gimbal setup. I am limited by the stock servo travel at this point but will be an easy fix with an 180 degree pan tilt servo. Was a bit trickier than I thought. I made a new damper plate with some light ply and then a box built out of the same light ply around the servo. The servo is now in a vertical configuration rather than lying flat against the damper plate. The key was to keep the box low profile in order for the camera to fully pivot around it. There isn't much clearance here. At any rate it works quite well. If I were to do it over again id probably just epoxy a pin affixed into a piece of ply and epoxy it to the servo and then epoxy the servo directly to the damper plate. The down side is its permanent. The upside is that it would have been way easier. I also had to add 1/4 spacers under the upper most damper plate to provide enough clearance for the camera jack. I also had to add some spacer to the legs.