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These look awesome! I had the same issue as donald_stouffer had. My side walls wouldn't print.

Prusa Slicer (Slic3r Prusa Edition) Settings: Perimeters:3 LayerHeight:0.15mm TopLayers:4 BottomLayers:4

Solution: In "Layers and Perimeters" Settings under the "Quality" Tab, check "Detect Thin Walls". Still thin, but now it Slices the walls.

In the end, I ended up using oniakki's method by setting top/bottom layers and infill to 0%. I then print in 0.3 Layer Height for quick & Strong Clips. Horray!