The blade weights 390g (14 oz) and the motor has two "6203 2RS" (17x40x12mm) bearings. The blade is an original German design, but the Al-Ko made blades cost a lot more than the ones from the aftermarket.
In Hungary we use blades made by a Hungarian company according to Al-Ko specifications and I've heard that they've turned out to be so good quality that even Al-ko itself put their seal of approval on it and sells it also through its channels.
The only difference between the original Al-ko and the Hungarian blades is that the Hungarian one is made of a tiny bit softer metal than the Al-Ko one, so if you hit a piece of rock with it and it bends, you can easily bend it back in a wise, plus the chances of small pieces flying off of it is less than at the Al-ko blades, plus it is a lot cheaper for the consumers.
About the cutting edge being upside down - it's my "fault", i.e. I happened to take that picture in order to analyze the angle of the cutting edge from close up (25 degrees) and didn't care about how the blade is positioned when it's installed.
I decided to have a custom made ballancer made at a local machine shop, custom meaing, that it will work only with the current blade type with a 19.6mm diameter center hole. It will work exactly as the cone type, except it will be just an inch tall cylinder with a rim on the bottom and the top center of the cylinder inside will have a cone shaped "negative bump" similar to the cone ballancer.
BlazNT: What do you mean on the blade "bevel"?