All these new fangled temp gauges, temp controllers and instant read sure make life easier. When I first started out didn't have any of those, strictly by looks, feel, and testing.  Kinda like digital never thought it would ever take the place of film !    course when I started smoking, there weren't any laptops, cell phones or internet,  Wow I'm getting old !   also remember gas at $.22 to $.24 a gal. and have gas wars and would drop to $.18
Gary