If it's not really about tuning or wiring. Then it belongs in here.
The single best thing from these courses so far is that it has mad it very clear how much BS and outright idiocy exists in the tuning industry. I can see why good tuners are both expensive, and very busy.
I can actually realize now how often I have been given bad advice from forums, poor info from my tuner, and even replaced sensors / performed unnecessary maintenance because the tuner lacked knowledge and skill.
This has been the best bang for the buck in a long time.
Glad you're getting some great value from these courses!