Thank You. I vaguely knew about this quirk but now I feel better/fully educated about this quirk and will bear it in mind since I frequently fly above water.
I think it would help your question to understand where the 400 foot rule comes from. I find that Part 107 and recreational pilots who don’t come from a manned aviation background don’t always grasp the intent and the underlying logic of these...
@WaldenKirsch - I emailed Thor’s Drone World to inquire about a LifThor bracket for my M2P’s Smart Controller, and was able to purchase the very last one they had, so try an email. You might get lucky.