[sick472]

The trouble I have run into is that the stud will often break off when trying to unscrew the speed nut. There's not much you can do about it except go slow and if it resists, work it back and forth (clockwise - counterclockwise a bit at a time, repeat) to loosen up the crud and corrosion and hope it eventually spins off.

I suggest using a 1/4" ratchet & 6-point socket on them. And, for the suborn ones...some dishwashing liquid as a lubricant. WD can be used, but oils may give you fits when it's time to paint. The soap will wash off much easier than oils.