Since I work on this site mainly during nights, weekends, and holidays, I can't give you an office phone number. I can, however, give you an email address I setup just for this site.
cpmtutor-at-gmail-dot-com
To keep "screen scrapers" from harvesting my email address it is disguised. Please replace the -at- with an @ and the -dot- with a . in the address below before you send the message.