This is available to everyone, but it was made possible via the support of Patrons of Crushing Krisis:
Now that I’ve re-read all of the X-Men Classic back-up stories as part of our Epic X-Men (re)Read, I had some adjustments to make to this guide. As a result, I rebuilt my reading order database for all of the Original 5 X-Men + Xavier + Havok, Polaris, Magneto, & Mimic.
That didn’t lead to too many changes, but I adjusted the placement of several stories. Also, reader comments lead me to update or add placements for all of X-Men First Class, Ka-Zar #2-3, Avengers #102-104, and several other stories and guest appearances.