Meanwhile, back at the Gainer Dungeon, I may have jumped the gun when I said my attempt at Metolal was already showing signs of age. I think I didn't let it age to stability. I just tried it again at 1+50, 65 F, 10 minutes, 35 mm EDU 400 Ultra, and got this result, a scan of a print on RC VC paper.
I thought you had added more Metol to the concentrate to estimate how much was oxidized. If so, which concentrate did you use? Was it the original or the "enriched" and younger version?