Thank you for the link to the screen video recorder - I’ll give it a go!
However, the aircraft started without the flight yoke and throttle quadrant attached - so it must be a binding issue.
Can’t imagine which one is the likely culprit - all the switches on the Honeycomb Alpha work as they should, and I erased the magneto commands as that magneto four way switch doesn’t cut the mustard for starter buttons. Probable culprit is the Bravo throttle with a switch doing something that it shouldn’t.
Guess I’ll have to delete all the bindings, start with the throttle input, and work the way through…