A benefit of having taken part in the GoFly Challenge is having been teamed up with a pair of mentors, one in the US Army (with whom I've lost touch and regretfully did not get to meet due circumstances largely beyond our control) and another in the form of Walter: who invariably replies to emails with an informative and informed response.
He is of that generation having the time of day for people, and which we are sadly set to hear less from as our lives move inexorably online:
As regards our most recent test-flight too, here's what he had to say: Congratulations on a very nice video, showing excellent controllability and performance.
What I call a qualified opinion.
Happy Holidays, Walt.