Mark,
I'm a relative newcomer to EMs who is learning more every day, thanks to you and others who are willing to share their knowledge on Pinside. (You've responded to some of my posts regarding Surf Champ.)
I just wanted to tell you that your website is AMAZING! The videos are incredibly well done and extremely informative, especially to those of us just getting into the hobby and trying to figure out how these amazing machines work. My only regret is that you are in Colorado and I am in Maryland, because I'd sign up for your class in a heartbeat!
But I wanted to let you know that your hard work spent creating those displays and videos are greatly appreciated!! I highly recommend them to anyone learning how to repair these games.
Thanks!