Happy to report that I finally got the adaptive toolpath working.
Seems i missed those little red contour arrows the first time. It’s not entirely clear from their direction and placement, but apparently that’s what flips the path between in-out and out-in.
Also during my random perusal through the other paths, I discovered the “roughing passes” option for the contour/cutout operation, to make the path wider. Another critical one for me, as I was having issues when these passes got deep and any bits of backlash would cause a chatterific mess from the tight tolerance between the walls.
Certainly taking time to learn, but the more I learn, the more I’m liking f360. It’s pretty damn powerful.
Also, for anyone who’s a fusion noob like me, I recommend using 3D adaptive over 2D.
I don’t know what I did wrong the first time I tried 3D adaptive, but I tried it again after getting a bit frustrated fighting with the 2D stuff. Every time I edited the 2D toolpath, the geometry selections (and hence the toolpath) got mucked up even if I didn’t touch that tab. I had to keep reselecting the edges in the right order to get the spiral path back.
3D just seems to work better and is a lot less glitchy.