Their is a discrepancy between the Solo transmitters reported tilt angle and the The Storm32 reported tilt angle. When conducting a smart shot the gimbal tilts in the opposite direction of where it should. If you look at the Solo transmitter when the gimbal is pointed straight ahead the transmitter reads 90 degrees, and so does the Storm as reported by Mavlink.
The problem is when you point the gimbal down with the Solo transmitter the lcd displays that it is looking straight down at 0 degrees, while the storm says it is looking down at 180 degrees. In my opinion, the Solo transmitter tilt angles are backwards. This can be further demonstrated by connecting to Mission Planner and sending ROI commands. Once this is fixed one could mount almost any camera to the solo with a storm and get smart shot functionality. I had been working on fixing this since last year, but have fallen short of time to do it since my little one arrived.
I’ll add that if using a storm with a Solo it works perfectly fine when controlling it manually, and provided a number of parameters are changed, up is up and down is down. Best results are when using a Storm32NT gimbal controller with dual imu to eliminate any yaw drift.