I have sharpened 8 blades so far and the tool has worked fine. I like the low sound level, too. I have grinded dry without water tank because this machine is sold mainly without water cooling. Let's see, how the diamond disk will last... I changed two 6mm allen screws in blade support to finger screws for better manouverment without tools. I also removed the red sticker for vertical zero point, because it was not in the zero point. I used 90 degrees angle meter to match the blade table 90 to the diamond disk and then draw a thin permanent ink line matching the zero.
I have saved now the machine price against sharpening cost in a sharpening shop. It though needs a bit training to get familiarized. So don't start training with Your premium blade but take a cheaper one first. A good trick is to put black ink to the sharpening area in the blade tooth to fine tune adjusments in the sharpening machine.
Martin 
