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After reading
this thread, the oddity struck me.
So, WI the Vulture in the Manchester, coupled with demand for Merlins, leads to a four-Herc *Lanc, & the Halifax gets Merlins, instead?
Does this make either the *Lanc (I tend to say the name remains unaltered, but...) or Halifax less effective?
I'd guess it doesn't speed introduction of the *Lanc; might it?
Any other butterflies in flight?