A little bit of additional info on the eBay Chamberlin 600: I spoke with the current owner, Ted, this morning. This 600 was formerly owned by Kevin Augunas, and the same one I saw circa 2003 when I checked out Kevin's MkII (formerly Erik Gavriluk's) before acquiring the Pindertron.
The sliders on the cheek blocks are the Track Selector switches (A-B-C) for rhythms (far left) and fills/solo (center). The amended posting states, "Yes, it works and it has been regularly maintained. As you can see, it's in very good condition. Not only outside, but inside as well. I will take more pictures and post them. However, I would recommend getting it serviced. When you push a button for a preset, sometime it doesn't go to the preset, sometimes it does. I heard this was an easy adjustment." I still couldn't get a clear answer on who serviced this unit, even when I mentioned Paul Cox as a possibility. Ted is going to take pics of the innards and email them to me later on today.
Unfortunately, I'm working full-time again and don't have the time to make an L.A. run to check it out firsthand (perhaps next weekend???)
Frank Samagaio
Start the year off right. Easy ways to stay in shape in the new year.