Anyone's tried repairing/upgrading original Vandersteen 1 speakers?

@OP,
Either contact Vandersteen directly or John Rutan(audioconnection).
You can also post at the Vandersteen forum-on the Vandy website. We'd love to hear from you.
Vandersteen offers great customer service. You'll probably need to buy 2 drivers, as they are matched. There are videos on Youtube that show how to replace the drivers. Models 1-3 were designed to be easily repaired. Just peel back the fabric and do what is needed.
Crossovers usually aren't the problem, but, who knows?
Unless you are getting them for $100 bucks or less, I would look elsewhere. You can find plenty of working model 1's at reasonable prices.
PM me if you need additional info.
Bob

Millercarbon, may I ask what version of the 1's you owned. They changed a bit over the years.

I'm running Vandy 1ci's with Belles Aria monoblocks and preamp and they sound ridiculously good. The fact that I paid $400 for them makes them all the more sweet. The 1's when setup correctly will reward you when paired with good sources and upstream equipment.