There are some fellows here whom are quite smart about scope use; the two moderators are for sure, nailing down problems that befool others. These PICO scopes are really useful. I am a semi-profesional tech taking on the trade late in life. My name is Don and I go by 'Fisher'.
       I am relatively poor, and although I told Tom Roberts I would buy one of his products, things have gone slower for me than I wanted...my financing is a long story...
     You are right, no one else teaches but the self; although the techs whom post here have been doing it to benefit all of us. I quite thrive on these postings.I am going to sit for an A8 test one day as I have been passing Ford self study courses and A8 practice tests.
              Good luck to you.