PCLoadPLA

I will upload a wireframe and STL later. When sliced like the picture, yes it will be full of infill, but I don't want infill in this case. It's not needed for strength and it adds print cost. Also, unless I use like 60% infill or more, I still can't print the smaller holes because they will end up between the infill lines, where is still no support underneath them, and you can't extrude plastic into thin air. The holder is closed at the bottom. It's a big block with blind holes punched in the top for the drill bits to sit in. The problem is that the drill bits don't go all the way through the block. So no matter what orientation you put the block in, the holes are impossible to print because it's basically a cylinder sticking into space. And there's no way to put support underneath the holes because Cura won't put support inside the model, only outside of it.

I'm making a drill-bit holder with deep, blind holes as shown in the picture. The problem is that the bore and the bottom of the holes are treated as "walls" by the slicer; this means there's no way to print them regardless of the orientation of the model while printing, because the "hole" is sort of sticking into space. I need support under the "holes" in order to print them, but if I turn on support, Cura will not add internal support to support internal structures like this. In the picture of the slice preview you can see the bottom of the smaller holes starts to print in mid-air, which will never work. One option would be to increase infill to perhaps 5mm between lines, but then print time goes to 24 hours vs. 4, and cost of course goes up by 10x or something too. Is there any Cura option to support these internal, deep holes, or other workaround I can try in modeling it?

I found the solution...set "fill gaps between walls" to "nowhere" or else use the Filter Out Tiny Gaps option to remove the little tiny extrusions. My print time decreased by nearly 20%, with almost no change in plastic used.

This is something I have been wondering about for a while but I haven't found which setting controls it. Often when Cura slices a layer, the movement is as expected, but after the layer is completed, the extruder moves all over the layer making very short movements with practically no extrusion. My guess is that it's trying to fill in some tiny small gaps somewhere. But in many cases I would like to avoid these small extrusions happening because it costs a lot of time, and I don't really see what is the benefit. I attached an image showing the very end of a layer. The head moves around to each corner of the triangle, even after the layer is already printed. There is hardly any amount of extrusion going on during these moves. How can I remove these extra moves--I tried reducing print resolution but that applies to the mesh. Is there a way to "reduce extrusion resolution" to remove very small moves? Or a better way to stop this behavior?