Here's an interesting site http://www.boehmworld.com

Craig
Bohm has always been like Wersi in allowing software and hardware updates to their instruments, however they have not yet embraced the computer based systems, and so most of the upgrades are internal hardware. (Just like previous generations of Wersi instruments)
BTW If you had purchased one of their instruments in 1984 (The first of their digital range) you could have continually updated it to the same spec and sound as the latest instruments.
Enjoy whatever you play

Bill