Good post Kharon!
"Was there not a model aircraft field right under the flight path at Tulla? Not the one near the thunderdome but one in Keilor park?"
Dunno, there was until recently (it may still be there?) a model aircraft field approx 1 km off the the threshold of 34 L at Van Nuys and everyone seemed to get along just fine...believe VNY was (or still is) world's busiest GA airport, everything from 172s to BBJs, and a whole squadron of RC aircraft buzzing around just off the threshold.....