I did in fact anticipate needing to do both drivers and said as much in my email to Vandersteen support. This is the reply I received which surprised me in a few ways...
"We rebuild the drivers reusing their cores so yes, you can send that unit back to us. We don’t need the other to make sure it matches. A rebuild on the woofer in a Model 1 runs around $180.
"We rebuild the drivers reusing their cores so yes, you can send that unit back to us. We don’t need the other to make sure it matches. A rebuild on the woofer in a Model 1 runs around $180.
Best regards, Jaclyn"