Geeeez!! This is my first visit to this thread and I can't tell you it pains me to consider giving the nuts/balls a 'love tap' with a BFH!
(just be careful not to puncture the cylinder -extremely high pressure gas inside - protect your eyes and anything else you treasure)
I've got a number of vices, but none that grip anything (or at least none that will admit to it.) I do have a couple of vises that are more than happy to crush most anything. (Just picking up Mikey's slack, seeing how he's probably away from his computer.
)