I owned WA - Wally Scott's ASW20 for a number of years. It was a while before I discovered he had secreted large amounts of lead in the wings and tail and that the W&B data was completely fictitious. I can confirm that with a CG well aft of the factory permitted range it can depart into a spin quickly and viciously!

With the lead removed and the CG returned to the permitted range, I never experienced another problem. There were reports of a tendency to spin when the "Jesus" landing flap position of early ASW20s was selected, but this again was not a problem I encountered.

Mike