As a 20 year solid state guy working on his second EM I dont understand how to robustly diagnose and fix/clean score motor and stepper problems.
Ned Ledod gave me a great how to book for my first EM but even after fixing it 100% I still get through these with brute force and not intelligence.
I get the schematic jumper approach as a noob and thought that was eye opening so that would probably be an A-list topic also. Good luck with your seminar