OK, thanks. I had a feeling it might be, but I'm not too familair with 15mm scale armor, so it seemed like a good idea. Aesthetics-wise, a pair of the 'barrel' sections would've looked about right.
I'll keep thinking of weird ideas.
Or, at least, I might see if I can find a local store that has these on-the-shelf. I think the Warstore link I have above is for five of just the roller unit (the frame and 'barrel' without the tanks... I might be able to use a couple, along with some engine-y parts I have around.
I don't think the rules we're using ever formally set the size of the big guys... May be a version in which everything is considered one 'square'.
This is, however, totally not
FoW related by this point, and I apologize.