I have made 6 flights with max. altitudes of 253 ft, 220 ft, 79 ft, 174 ft, 151 ft, and 7 ft. The DJI Go 4 app shows top altitude of -97.9 ft. Not sure what is causing this?
Looks like a great setup to me. I like that you added a middle slot for those you want to move display assembly more forward. Ordered one today on Ebay, will give it a try.