Hi all,
Just upgraded to 3.0 and I'm on my first few test prints. On my first I noticed some horrible shredding happening to my external perimeters. It turns out that S3D fixed the trouble with infill not touching perimeters, which is great. It also means that when you import your .FFF in to 3.0 you'll still have all the over extrusion and overlap settings for 2.x which were required as a workaround. Turn overlap waaaaaay down, or it'll cut in to your perimeters and cause major problems.