What is the act of collecting things but a mild form of obsessive-compulsive disorder?
Heck, to hear the new psychiatrists tell it, everyone has a mental illness of some kind. Some people out there even wear their so-called mental illness like a badge of honor.
That being said, I don't think you're crazy at all. Now, soldering together electronics parts to make audio gear for a home studio so I can make progressive rock records of my own? That's crazy.