Krell HTS-1 Upgrades

Is anyone aware of any software or hardware upgrades that are available for the HTS-1?
There are none... only the HTS2 is upgradeable.
Oops... meant only the HTS2 is upgradeable to the HTS 7.1
Ship Krell your HTS-1 and $4000.00 and they will give you a brand new HTS 7.1. To upgrade from an HTS2 to HTS 7.1 is $2500.00.