Actually the keyboards are standard Midi Keyboards stuck in to a cabinet with a 15” Touch sensitive computer monitor stuck behind, and which any one with moderate diy skills could make.
The only similarity with Wersi is that they both use software for operations, and run on a Windows PC. The Wersi however is a fully integrated unit with custom cabinets to contain all the items, plus a vastly superior sound engine, and of which at present Tornado systems can only dream.

Bill