I just saw your question about my Kenwood TT. It’s a KD-64f. Linear-tracking. After sitting unused for years, it wouldn’t work. I watched a couple of YouTube videos and felt emboldened to open it up. Along with the usual dust, there was corrosion on the bar that the tonearm assembly rides on, and debris on the cog that drives a pull string and mobilizes the tonearm. I got the tonearm to move back and forth, but it still would not lower enough to contact the record. I fiddled with it as much as I could but still wouldn’t work right. One guy on Youtube thinks I should keep it, in hopes that I might get it working later. He noted, “They don’t make them like that anymore.”