I finally got around to unboxing my Woodcraft super sale CM clamps today.
I've also been monitoring the threads on the clamps locking up. Well, guess
how the clamps are shipped? Yup - with the jaws together. However, the
screw was not turned all the way to the left or the right - it was sort of
midway. A slight turn to the left to take the tension off, lift up on the
screw and it slides right back. Perhaps the solution to the locking clamp
problem is to not store the clamps with the screw all the way in or out.
BTW, I did tinker with one clamp, was able to lock it shut, but was also
also to easily open it with a screwdriver as posted elsewhere in this NG.
I also glued up some raised panel doors today using both CM and K-Besseys.
They both do their job well. Can't say one struck me better than the other.