Another thing to watch out for is the two halves of
some if not all
were screwed together with self tapping screws. When you take
them apart bit of plastic may come out of the holes or fall off the
insides of the screw threads. That plastic if gets between the platter
and head will not be to the heads advantage.
Ah, oh.... How should that get between
the heads and the platter? It's
nearly impossible to get something of substantial size into that gap.
Look at the RK05 manual (and pack bag): It's the *really* small stuff
that gets into the wrong place.
Normal dust from the paper you used for cleaning (and from your working
environment) is kicked off the platter by the head. Makes funny sounds.
My procedure: Clean the disk, load it, manually visit the whole surface
with the heads. If it crashes or clinging does not go away soon,
reclean. If the disk has become silent and is running nicely, I give the
heads a "quick brutal cleaning": Towel with IPA, between the heads, load
heads onto the towel, move towel until heads clean. Must be done
I once had an RC05 disk crashing. With an awful noise and a white stripe
on the disk. After cleaning, both heads and disks were fully functional
again. But I have also seen packs which look perfect but either keep
making heavy sound or having data errors.