I bought some Pegas #MGT blades from Denny (Fast delivery!!). I have been using FD-UR blades forever and a few Olsen blades once in a while. I really like how Pegas blades cut.
I have always had a problem on the Hegner with breaking blades. Usually on top, at the Quick Clamp, but sometimes at the bottom clamp. And I know that if it breaks in or at the clamp, you are over tightening the clamp and kinking the blade (BTW - I learned that here at SSV). And yes I know that I am being too ham fisted and over tightening.
With the Pegas blades, the only breakage is in the middle and that is VERY rare. And they seem to stay sharp longer too.