Hi Cyrus, I usually pour over the various downloadable manuals, and refresh my memory with the Q&As in the JRDG Knowledge Base at:
http://jeffrowlandgroup.com/kb/
While the facility seems to have some gaps, it is amazingly complete on some devices..... there are over 120 questions on Criterion alone..... and most of them apply to Corus, except for those that discuss the NiMH battery system.
G.