Shell computed with OpenScad
Normals and Holes Fixed with Meshmaker and Cura Mesh Tools
Smoothing and Reduced with Meshmaker
Tinkercad to add base - quick and simple - Weave
Blender to check for more errors.

No supports necessary.
20 percent infill.
Sink the weave bellow the plate plane a bit in Cura... so it has more flat space on the bottom.