Is anybody doing this? I really like the dual circle level built into my IPhone XR, and have used it in setting up my tripod satellite TV antenna. I am envisioning maybe a small shelf attached near the landing gear switch that I could lay the phone on, or maybe even just 2 shelf braces that I could lay the phone on. Maybe a rubber band or velcro tie could keep the phone in place while levelling is being done. The markings on my old side-to-side bubble level are worn off anyways.