Does anyone have any advice on how to get my machine up and running? I have a Tascam 22-4. The tape slows to a halt eventually in recrod and playback. Some people say it's old tape build-up, some say it's other things. My question is what can I do without the aid of a professional. I have found one guy in my town who fixes reel to reel machines but can't locate him anymore. Suggestions?