Yet another open-ended question to answer: how are your electronics and tinkering skill levels? This goes right along with soldering and brazing skills. Improvising custom components that are durable is not for the faint at heart. It takes a lot of confidence and mental toughness and even more time and effort. Homemade stuff tends to rip, ravel, rust, bust, and turn to dust while you watch. I'm just warning you to be prepared for the inevitable. Because this is exactly the direction you are headed.
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