Since this is the thread where it all started, figured I'd come back with an update on the Garrard 401 that
@HiFi Guy guided me to in Portland, Oregon. I completed my trip last Saturday and was able to get the table set up that night, but it wasn't until tonight that I think I finally have everything dialed in just as all of it should be. The first major challenge was the SME 3012 II tonearm. So many weights and angles to adjust that there are a lot more steps involved than I'm used to for setting the tracking force and the anti-skate. Thought I had it figured out, then
@HiFi Guy reminded me it's a good idea to read the manual. I thought I had! but apparently not when I most needed to, so eventually, I got all of that sorted and the arm appears balanced, level, perfectly positioned, etc. Beyond tweaks, the most concerning issue was that the table was running a bit fast, and the speed control was maxed out to the 'slower' side of the scale. I had every reason to believe I could solve this by replacing the 50 Hz pulley that came with the unit, with a 60 Hz pulley I ordered from the UK. I was able to swap those out earlier in the week, but nothing really changed, which was puzzling. Until I figured out the tech at the shop where I bought the unit probably had reduced (by sanding) the diameter of the 50 Hz pulley to get the unit running close to speed (just a bit fast) when I bought it, so that in effect, there really wasn't much (if any) functional difference between the two pulleys. Looking online for alternative solutions, a number of people had written of a problem with the turntable's magnetic bar that controls the speed brake and is the main mechanism involved in fine-tuning the set speed. Over time, the magnet loses its magnetic force, but adding a small, strong magnet to it can solve the problem. I won't go into all the ways I misunderstood how this would work with the 401. Suffice it to say, after a few 'doh!'s' and a few 'aha!'s', I figured it out and indeed a small neodymium magnet solved the problem. The unit is now running to speed with the speed adjustment control centered. Here are a couple of photos, and a link to a brief video, all from before the speed problem was solved.
Link to Video