I'm testing this now, and am coming in pretty close on it. Just to be sure that I don't make it too easy for anyone, I'm using Germain to develop it. I don't think I've ever seen such extraordinary negatives. If you want to give it a shot, try 10 minutes at 68°F, which is great for overcast conditions, and it is looking like ISO 125 or so is where it is going to shake out.
I've been wanting to try Germain for awhile, because it can be replenished with its own stock solution and lasts, according to Mo himself, virtually forever. I like that! Since I will be working in my truck camper, it makes things easier. The acutance is astonishing; the cleanliness of the shadow areas no less so. Haven't made prints yet, but the highlights appear richly detailed and well defined.