Well, after 11 days continuous burn-in the 4490 has provided an exceptional improvement in SQ and is providing the most cohesive reproduction I've ever experienced on my system.
All aspects of fidelity, i.e. timing, image, spatial accuracy, dynamics, clarity, and details have exceeded my expectations for a $70 upgrade. Only leaves me wondering what the Multibit is capable of.
Comparing the Uber Upgrade board to the 4490 reveals a remarkable similarity in the components used and their placement - I would guestimate 90% the same - which leads me to believe that the Uber Upgrade is also included.
If you are considering 4490 upgrade I can highly recommend it :-)
Regards...