What I doubt is that Yamato was ever pushing hard to supply swapp-able heads. I doubt they would have done so even if BW had said yes.
And, yes, I'm saying it's entirely possible that Yamato "passed the buck" to BW. Instead of angering the community, they can just say: "Well, we wouldn't have been allowed to do so, even if we wanted to. . . sorry."
Not exactly a lie. More like spin.
H
HEY! What'd I tell you about quoting me??? What'd I tell you about quoting me???
My mudda quoted me once... ONCE!