I found what I was thinking of...and it involves 2-3 lb northern strain BG. It's over on BBG. I hate posting links to other folk's stuff on a different forum without asking them first, so I'll wait until I can contact them.

"Forget pounds and ounces, I'm figuring displacement!"

If we accept that: MBG(+)FGSF(=)HBG(F1)
And we surmise that: BG(>)HBG(F1) while GSF(<)HBG(F1)
Would it hold true that: HBG(F1)(+)AM500(x)q.d.(=)1.5lbGRWT?
PB answer: It depends.