Anyone done the xupgrade on their Wadia 860?

Has anyone had their Wadia 860 upgraded with this ' x upgrade "? Cost? Improvement? I'm not feeling guinea pig-ish. Does the unit have to be shipped, or is it done locally?
Of course, you can read this from about 20 different people in just about every usergroup........but before you do ANY mods on a Wadia player or absolutely should talk to Steve Huntley at Great Northern Sound. His number is 651-762-8333.
I've had two GNSC modded transports....and they are spectacular.
There is no sonic improvement with the x-upgrade. At least not when the W860 is used as a cdp. If you run a DVD-A into the Wadia or use a digital eq it may be different.