There's not much different from my DD7 w/s is a very nice & rigid construction. Until now I'm using it. DD10 is the top of the line. Too bad the explanation is not in English so others can understand it. Thanks for sharing.
I'm proud of my native tongue and I will not yield! ;-) No, seriously, if the spirit moves me, I may try to record a new explanation in English, and record it over the original sound, or, more probably, I may transcribe it and translate into English and publish it below the video.