I wish I could find a copy, it was probably the best, most detailed article ever written about trimming a model to fly
correctly, before the days of computer radios. I don't know the exact dates but it was a short time after he won the
US Nationals with his Intruder, sometime in the 70's.

tommy s

PS: Dick Hanson probably knows as much about this as anybody, maybe he can help you with details.