I went back to EY again this morning and was successfully able to recenter BRSY this time. Because I was still a little sore from yesterday, I rethought my positioning at the viewport for the adjustment. I used the yellow stool from the ISC table and some foam to make myself a comfortable bench to lie down on and used the side of the stool to support my elbows. I also moved the workstation to the floor so I could see it more easily. Much better than curling up as small as I could, cross-legged on the floor for hours at a time.

Two things I still wish I had for this : a tablet or laptop that I could see the diagnostic plots on in the box so I didn't have to turn away from the viewport and a couple of padded c-clamps that I could use as wrist rests. I had one on the right side (this is clamping down the table for a co-located sts2) and my left shoulder is sore, I think from a combination of holding my left arm up and looking left continuously to see the diagnostic plots. Not a big deal for a couple minutes, but if you're camped out for a couple hours...