I recall dad talking about Arthur Kell being the CFI, unfortunately Arthur was killed in a spinning accident in a Chippy (VH-FTA), the 20c coin caught in flight control system incident.
That was Arthur Kell, DFC and Bar, the aircraft was VH-FTA (C1-0499) which crashed near Cobbity NSW 27.1.1968. I'm perhaps a fraction older than you, Roundy - I was charter flying in WA at the time and can still remember the shock waves through the GA ranks following this accident.