Bob Schleicher (ca. 1942-2020) was a Hammond tech (and a good one) in Oakland, California (see ElectronicInstrumentService). Much of the best material in the OriginalHammondLeslieFaq (and thus on HammondWiki) was contributed by Bob.
Please visit his web page at 
http://www.tonewheel.com/.
The content of this page is Copyright (C) 2000, 2001, 2002 Geoffrey T. Dairiki and
the other authors of the content, whoever they may be.
This is free information and you are welcome redistribute it
under certain conditions; see
http://www.dairiki.org/HammondWiki/opl.html for details.
Absolutely no warrantee is made as to the correctness of
the information on this page.