Just a quick follow up. I finally got around to testing the new Stonehenge. It cleared fine, but it was A LOT slower than Platine. I made an exposure with identical coating/time that worked for Platine in the same session, and the Stonehenge print was significantly lighter and the blacks were grainy. I didn't have time to do further testing, which I will, but the initial test led me think that the new Stonehenge wasn't behaving the same as the old stock.
I am liking the Platine and will probably buy some more.