I don't know what the mechanism is to adjust the
drive speed
of a Lobo drive.
Did Lobo make drives??
I thought that they just made the boxes and stuffed them with existing
drives (Shugart, etc.)
Later, however, they did make an "Expansion Interface" for TRS80s, which
then dumped them into having to get into OS's, which brought about
LSI/L-DOS.