Thanks fore the help. Does Windows 10 3D Builder tell you what was wrong with the model before it was repaired? Or is it just automatic? I've tried Netfabb on a couple things, but I'm still learning the modeling lingo to figure out which things are actually wrong. I also learned that the automatic repair can sometimes alter a model in unexpected ways that can eaither lead to different problems, or just change the model so it doesn't look as you intended. For example, was the problem with the ring model that it had holes in the mesh? Incorrect manifolds? Incorrect normals? Duplicate vertexes? Also, did the file come out any different in size than the 85mb or so that it downloads as? Flux Studio was super slow for me on this model before, even trying to move the model or rotate it caused significant hangups. This is all on my mid-2014 Macbook Pro. It's not exactly a weak machine, so I would expect better performance than this.
My latest example (and other complaint) has more to do with multiple files trying to be sliced at once. I made a wonder woman headband for my wife, but I really wanted to print all the parts at once after organizing them on the build plate. The software would just seemingly freeze when I tried to slice it with all the parts imported. It has no problem at all when I did them individually though. It also has no problem when there are multiple parts in a single stl file. It should be pretty similar, I would think. I don't understand why it would have trouble with multiple individual models, but I'm still learning how all this works together.
The files can be found here: https://www.myminifactory.com/object/wonder-woman-tiara-dawn-of-justice-19631
Still, it would be nice to print several parts to make each print job as productive as possible. Also, having several parts can sometimes make each part turn out much better since each layer has more time to cool between layers. I've run into this issue a couple times with smaller parts where it would have been better had I printed 2 copies at once to increase layer time. I can't seem to get the layer time setting to actually slow down enough. The small perimeter speed has been helpful though.