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Im printing the blades separately in vase mode (spiralize outer contour).
So, I print them one at a time, I use a brim on outside only,
For Blade #1 I use a Brim on Outside only and Support. No top layers, but I do leave bottom layers on for this one.
For the rest of the Blades, I just use a Brim on Outside Only with no top or bottom layers, and no support.
Important that you change the Line Width in Cura to 0.85 mm or so...
This makes the wall about 0.87 to 0.92 mm thick. Nice and strong!
This will work with a smaller nozzle too, so if you are using a stock 0.4mm nozzle, it will over-extrude to form a nice thick wall.
If you need some help getting your slicer setup. I can post pics of my settings. Just let me know. :)