Eddie,In your "Analog Tape 101" article (August 2000), you mentioned several 2-track machines, but not the Studer PR99 MkIII PRO, which I'm considering buying used for $600. What do you think about this machine? Also, in the article you state that the ReVox A77 and B77 have three speeds. The ones I see for sale seem to run at 3.75 and 7.5 ips. Is there an internal speed change switch? Were these configured as consumer (quarter-track) or as professional (half-track) machines?