Fillet edge at transition loft and mesh

Hi there,

I’am quite new to GH. I want to have a rounded edge of my mesh. I constructed a mesh and its offset and connected them with a loft. I really want to have a fillet edge at the edge of the loft-mesh transition. Can someone maybe help me with that? I also tried to make an extrusion at the loft and used the fillet edge option. However, this also failed. Because I don’t get only the two outer edges, I think. Thankyou in advance!