I actually also thought it was nice of Kingwa to show where he copied it from, now he actually had copied it :)
Regarding copying the cabiniet its actually far more complicated, because it demands production competences that is relatively rare in China. You need to have excellent tool engineers, and good technicians and higly skill labor for production. It will come in years ofcource. But the sense and understanding for +/- deviation is not the same as the sense for copying. And it especially shows in audio-gd product, they are crazy unprecise and not a beauty. But who cares, its not the looks that matters, its the inside. Its hifi, not a wife.
I'm not saying he actually copied Krell in the sense that it is identical to their design.
Of course Krell does not have the rights on current-mode transmission and amplifier topology. In a sense, everybody is copying everybody since they all use similar designs with only slight variations and different component grade (both of which do make a difference in the end).
Kingwa probably got his early inspiration from the Krell design but he developed his own design over the year, while maintaining compatibility with Krell's design. That's what it is about: compatibility.