When I didn't know better and had zero patience, I managed to mess up my two Sonnets; I have since bought two steel nibs and they are working very well, but just realized those two old nibs are 18k... I wouldn't try to improve them myself, that's what messed them up in the first place, so I would look for a nib meister... Is it worth it? I'd end up getting (used?) sections, barrels and caps (and a feed!), I do quite enjoy my Sonnets now, with nice ink and paper... A bit of wax on the caps to stop the evaporation ... And a lot more patience.
I remember them being a lot more messed up, they don't look that bad now, but are very scratchy and bent... I have an aversion to gold but appreciate gliding nibs.