Many thanks to the never ending sources of information!
Mini Disc Community the definitive source of Mini Disc informationAgain, many thanks to those that have given me vital information.
Matt Sephton These web pages and some original artwork
Sony MZ-R50, MDR-G61 catalogue photographs
John Seto CD Walkman PSU and car adapter information
Ralph Leuth Scotch whisky-box cheap storage
Dave Manaloto Faster fast forward and rewind
Martin Clinton International PSU details
Myles MacRae Availability of MZ-R50 in the UK
Ron Spiegel Alternative non-Sony PSU information
Derek Streeter SCMS information
Iein Yoon The location of the MZ-R55 press release
Zach Dykstra FM modulator info