My brief experiment with K mount lenses on the Q is over. Until the Pentax adapter malfunctioned, I got some pretty good images, but I only got about 20 snaps before the adapter started closing down randomly, then after a few more snaps, the leaf shutter failed completely. I sent it back to the vendor for a refund. Since several other people have reported identical issues, it seems to me to be a QC issue. For those of you that haven't had any problems, I hope your success continues, but I'm not willing to risk another $240+ to see if I get a good one. My tripod foot finally arrived today, too.
If anyone needs a brand new PTX 38100 for cheap, I just listed it in the marketplace.