Where did you get the stand I have a similar one for my 12.9 but the base is slightly smaller. So anytime you bump something or go near the iPad in general it wants to fall over. The manufacture states it’s for a 12.9’tablet but it’s for sure not
I have this setup with Samsung 360 touch below my 32 inch Samsung screen now and it's very efficient moving between mouse keyboard and touch screen while sharing from one screen to the next. I approve 🙂