Hi Tudor, thanks for posting the file. I was hoping that would help me understand what you are asking about but I'm afraid that I still don't understand.

Are you trying to fillet curves instead of edges?

> orange/greeen - for blend
> orange/blue for fillet

Not understanding this either, do you mean you've already done a blend between orange and green and a fillet between orange and blue?

Sorry I'm not getting it, - Michael