Hi zarkow,
Here's a way that might help to jump through that hoop.



I wasnt really happy in that I did the final network using a custom tolerance set very low to get a nice looking surface, but this could probably be avoided by creating the projection curves with more care to create a better flow for the network generation. You can tell in the end where I had to extend the wheelwell cutting curves out to get a good trim. Iif you can trim the wheelwell with the original curves, then you havnt deviated much from the intent. A little more care in that earlier part may get better results. But really, this is just doing what we see Michael repeat alot about making a larger surface to trim down. creating the surface in this way from the start would get even better results. Here I just worked with the curves you gave.