Hi,
Thank you for doing all these. I just ran into the solution manual you prepared today.
In case you are still interested in that, the solution to problem 8.1 of Thermal Physics by Kittel and Kroemer has some problem.
https://photos.app.goo.gl/iTrThMmZgh9YaWAr5
If you would like me to, I can send you other updates if I shall find other problems later.