reading that park tool howto, the bit you are seeing is probably just a dust cap for the bearings & pawls. It unscrews in the drive direction, therego turning it the other way would act as unthreading the freewheel from the hub BUT. I bet the cap will give out before the thing comes off the hub.
Looking at my freewheel covers (shim600 + a random campy + some cheapies) they are all metal, but I would bet they would break/shatter/twist before the thing actually came undone.
reading that park tool howto, the bit you are seeing is probably just a dust cap for the bearings & pawls. It unscrews in the drive direction, therego turning it the other way would act as unthreading the freewheel from the hub BUT. I bet the cap will give out before the thing comes off the hub.
Looking at my freewheel covers (shim600 + a random campy + some cheapies) they are all metal, but I would bet they would break/shatter/twist before the thing actually came undone.