I have a Fisher 800B I’m trying to get back up and running and would like to expand its functionality. As you know, the unit has only one auxiliary input. I also have an older Cambridge Audio DACMagic I’ve used with the unit for its intended purpose and for increasing the capacity of the auxiliary input. My questions on DACs are these. Are there DACs that provide for more inputs and would do double duty as a switch box for the auxiliary? Or could I achieve expanded functionality by simply stacking another DACMagic into one of the inputs of the unit I already have? I’m trying to keep this simple and not stupid and appreciate any advice you can give. Regarding the 800B, I’ve had this thing for 33-years and in my career I’ve drug it all to heck and back and it’s like a Timex; “it takes a licking but keeps on ticking.” I also have to say it’s built like a tank but sounds like a symphony. I love this thing, which brings me to a second question. I’m out in California. Can anyone recommend a shop or facility out here that can rebuild this unit? Thanks again and I look forward to all comments.