Ok, my first nurbs modeling. This is a hood of a car and I need help rounding out the lightwell.

First off, I trimmed off the lightwell with a projection tool using a circle and then I used trim tool to remove it. Now the hood instead of being an isopalm, is a trimmed edge. I was wondering if that would work like an isopalm. I tried using the trimmed edge of the hood's trimmed hole, and the isopalm of the cylinder i'm using for a lightwell to round out the edge of the hole, but it dont work. How do i fix this.

I also tried fillete before this, but it didn't work right so its kind of frustrating. Been messing with it for about 2 hours now and still can't get it right.