hi lowpost
mine are the older driver and 3 wood that have the hosel part of the driver. it the old zing 2 driver and 3 wood i have and the hosel looks like the irons, i know the type you mean i have seen them and they go into the body of the driver. i think Ping offer different hosels and that can offset the head and make it more closed or open faced. i would think they would be a nightmare to work on and harder to get hosels to fit.
cheers
bill