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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!