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First layer supports inadequate

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I'm using Cura Lulzbot edition 3.2.32 (current) and I'm having difficulty printing objects with support at very small scales.  The current project is a model tank that measures about 12x24 mm.  Obviously, a tank model will need support under the hull while you're printing the tracks up to that level.  Cura isn't adding support for that area until the fourth layer, which won't stick, of course.  If I scale this model up a bit, it will print support appropriately, but it's having trouble at this smaller size.


How can I force an area to print support?  I've tried rafts, brims, etc, and there's still a support gap.  I've also tried adding a solid rectangle model, and designating it as 'print as support' but can't get that to sit under the model.

m26 Layer 3.jpg

m26 Layer 4.jpg

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