Hi Dragolin,
Tried to take some pictures of both arms, but somehow did not get the lighting right for the bottom arm on which I put the Hegner Clamp, it all blurs up so You can not see anything. Just took a photo of the top arm, but did not put the Hegner clamp on it. What I did at the bottom was to put the screw that hold the original clamp through the hole on the Hegner clamp and mounted it horizontally instead of the vertical mount for the Hegner as I said in my PM it just about holds the blade and it pulls out quite frequently, but it makes do untill I get my new clamp which might take a bit longer than was first said, so hold thumbs for me that I get it soon.
Here is the picture of the top arm don't know if it is of any use to you.
David