For those with K5 lock up problems:

Hi,

Glad to hear that your camera is up and running. Yes, I share your concern about the shutter box motor in the K5 II series of cameras.  I am hypothesizing that the type of motor being used by these newer models is different from the ones found in legacy K5's.  This may in part being due to the 7 shots per second capability in the mark II's which is due to a faster motor assembly....................Jim