I'm a LE officer and a defensive tactics instructor, and use wrist locks in that capacity, but rarely when I roll. I'm not sure why I separate the two. I should probably add this to my game considering I'm pretty proficient with them.
George, I would be interested to see if your wrist could handle radial deviation, meaning when you are goose necked(palm to forearm) if you can handle rotating the hand to either side. We call this a Z lock. I have found that this can usually cause a tap even on people with very flexible wrists.