Sorry so long in reply, have been out.
My microp 1991 works very well usually. As others have said, it begins to
studder at about 5 min left in capacity. I have it mounted in an oven. At
first it would get so hot, I couldn't touch it. I opened both side doors, and
directed a 14" fan on high speed right at it. Now it stays just above room
temp. Sometimes I try running without the fan, but the drive gets warm, and
then clip playback problems ensue. Mainly intermittent picture distortion on
various frames. I may get several more to heat the building this winter.
But really, as long as I keep it cool and reorganized (which can take several
hours) it is performing as well as any I believe. However I don't often try
HQ5. I usually need the capacity more than the increase in quality.
Greg