New crossover for PMC fact12?

Hi,

Quite a long time ago, I bought a pair of PMC fact12s which I think are excellent.  They are also one of the few floorstanders which will fit in the available space.  I gather PMC have a new crossover which can be dealer-installed in older models like mine, which would bring my speakers up to the latest (Signature) standard.

I would be very grateful if anyone who has done this could let me know how they found the results.