Hi,
I've started practicing with MoI by creating a car but I'm having some problems. I start with a sweep but once I mirror, I can see a seam in the middle. I've redone it with a simpler example and I'm still getting the same problem.
I made sure all my profiles were starting perpendicular when looking from top and front.
I've also tried mirroring the curves instead of the surface but I end up with a super funky result.
Here's the simple test:

|