Is it just me, or has the meaning of "approved control surface gust locks" changed.
I think SWH has hit it right on the head, when I learned to fly every Cessna had the obligatory two pieces of wood, bolt and wingnut attached to the rudder.
However in this day of Regulatory Compliance, I suspect that the said rudder locking device wouldn't stand up to scrutiny, certainly not without an "EO"...
PS: I thought the re-hashed Cessnas built in recent times came, with a factory made (metal) rudder lock?