No, don't do it, please! I'd have to buy it, or at least really want it. Save me the pain.
The 2-6-6-2 wheel arrangement is probably my favorite articulated type; I like the
symmetry (as in USRA).
Also, they can be big enough to be Big, but small enough to be 1:48 and still look plausible on moderate-sized layouts.
I have no particular interest in the N&W, but I do like some of their motive power and
the fact that they were building -streamlined- steam as late as 1950.
So, a Z1 would definitely get on my radar. Drat!