You deserves to get paid for copilot.Still tweaking and testing but overall it works. One TelloFpv instance can serve one or more Copilot instances, which in turn can serve one or more Copilot instances each.
The hard limit seems to be the number of DNS leases that Tello can issue in one session (that is how many phones can register to the extender's network). That limit seems to be 6 phones in total (one TelloFpv instance, and 5 Copilots).
I am still a bit undecided how to release. I can release Copilot as a menu item on TelloFpv ("Copilot mode / Pilot mode"), or if I want to release Copilot as a separate (free) app.
Make it a lo cost add on.