This is good to hear. I currently use the Groove Tubes MK2 with sub out to a K10, which is like the best of both worlds sound wise plus both cabinets are about the same size, it's a pleasure to transport. For piano, SV-1 and Motif sound very good taking advantage of running them in stereo. Organs from SK-1 or VK-8m sound even better. Happy with this current setup, looking forward to hearing further reviews of the new MK3.