Hi @all,
I bought the Ajamsonic upgrade around chrismas and installed it with an adapter,bought over amazon( 12 EURO ), because another german musician (Snoopy) gave this hint. I never had an error described in this thread and I'm very satisfied.
The only issue I have is the startup time of nearly 4 minutes. This is definitly too long for a reboot on stage.
Another point with the audya ( not espcially an ajamsonic problem) is, that all your programming work with pen styles, programs and AJ stuff is bound to the hardware. I pray, that my audya never gets damaged. With my Tyros I would put my USB stick into another device and "it's mine". With my Audya this could never be possible. You can't even put your ssd into another device, it won't work. You can't make a restore from a backup to a new ssd, it won't work. You only can pray and be careful.

Regards Tom