Good stuff there, my Dad kinda similar in hobbies, was a Sonarman in Navy, built custom monster Electro-voice speakers and Heathkit stuff, got me my first crystal radio set from Radio Shack.My Dad was an electronics nut. But then , he was also an Airborne RTO all of his Military career . I remember he built a Heathkit 27in color TV around 1969. No cabinet. He built it into the wall in the family room. Then I built a small 12in B&W tv for my room. After he retired, he built a DOS ms computer that he used to run I's and O's on. I never did understand that stuff, but it excited him. R.I.P. Dad...Still miss You...