I Made a scroll inspired by that of a small games rifle plate

Scroll, need help with my beveling edges or any other recommended command that an also could g1 be involved, My file is no big, I spent much time on this a will email the rhino 8 file,

A gue

Adjust close crv seam or curve with g implents that run a pipe sweep or rail revolve. I dont understand the fillet or bevel patch. A am quite confused especially on clicking in an out of the yellow