Using the RRC3 tomorrow at Airfest to control a two-stage flight. This rocket was configured differently but new rule at Argonia is "No Timers" for two-stage flights. So now have the RRC3 looking for a certain altitude (2000 ft) after a fixed time (6 sec) to trigger sustainer ignition.
I had heard this from another RRC3 user flying a 2-stage at Argonia... best of luck on your shot tomorrow, Tim!