Ollie,
If you're not going to have the Spyders, will you still be the Spyderman? ;-)
As a fellow Dragon Wing owner, I would think they'd have to modify headstock some. Seeing as they are four on a side, they might have to lengthen it, or maybe even create a new headstock to accomodate the extra tuners. A longer headstock would affect the balance I should think, but I'll defer to the pros at Alembic on that one. Have you talked to Susan, Mica, or Val about it? I'm sure they'd have some ideas. One thing's for sure - an 8 string Dragon's Wing would sound awesome.
I see you're still looking for a Status Buzzard I. Hope you get one, but as you know they are rarer than hen's teeth these days, and the ones that are available ... well, they're out of my reach anyway.
Best regards,
Alan