Must be Cather's P4 adapter..nice, never seen one of those before.
And #Rotor, I'm afraid I can't really contribute anything to this topic, but I'd just like to say you're one hell of a nice guy to be so generously helping people make blocks that you sell
I know Cather does it too, and I mean no ill towards the Man, but I just think you're real nice about it. Thought that was worth saying
Cherro