Vandersteen 5Aa Carbon--any 5a owner's opinions?

With the Vandersteen upgrades to the Model 5 Chassis (5 to 5A and now 5A to Carbons), there is very little margin and very much time/effort. As a straight up business proposition, a normal manufacturer wouldn't even consider it. However, Richard Vandersteen is committed to his original owners, and therefore will be offering the 5/5A to Carbon upgrade for these original owners only.

I've had 5A and now Sevens and can't begin to describe the joy they bring. The 5 Carbon will certainly be worth it, as the new midrange is really spectacular. Enjoy your 5As for now, and rest assured you can achieve even more with the upgrade. - Pete -

I forgot to mention that Richard Vandersteen will be featuring the 5 Carbons with Audio Research electronics at the upcoming T.H.E. Show Newport Beach June 3-5. Here's your chance to hear them (albeit show conditions).

Crap, upgrading 5/5A's means he's probably not working on Vandy 6's.

For the record, the 5a to 5a carbon upgrade will be $8600, but as has been pointed out, only original 5a owners need to apply.

How difficult is it to set up Vandersteen 5As yourself with the equalizer & all that?