John:
Email me and I will pass along a tremendous amount of information to
you about both maintenance and proper use of the 510. I used to
maintain about 65 of these for Professional Instrument Courses, Inc.

Your email address bounced back, although it seemed like a real one!

Thanks, Bill... I did email you using my 'real' address. The effluent
account (aka spam account) was dormant as I hadn't used it in awhile - it's
active now.