Charles,
Thanks for the great webinar. Something you said last night got me thinking. You mentioned how Greg started the chipguide by logging his Mississippi Valley Riverboat chips and then it grew to what it is today. It reminded me of the Internet Archive Wayback Machine website. So, I did a search and captured some screen captures of various years from the chipguide. Kind of neat to see the progression.
All screen captures come from www.archive.org

The earliest I could find was from 4/5/97

The rest of the scans are from 1999, 2004, 2008, 2012 and 2015.