There is a good visual guide here:
See the section called Force "solid" infill where needed to see what Gr5 is describing.
Never tried it myself but the 3dverkstan guides are all excellent.
There's lots of tricks to change infill for different parts of your print. One trick is to put tiny cylinders inside your print - maybe 0.1mm in diameter in the area where you want solid infill. Cura will put walls around these tiny cylindrical holes and strengthen your print in that region.
Another trick is to use S3D (not free - simplify 3d) which allows you to choose regions where you can see "this region should have 100% infill.
Cura 2.X now allows this also - you split your part into multiple parts in CAD by cutting it up into 2 or more prints. Then load into Cura - do different infill for each part (icon on the left side) then merge them all back into one part again. I don't think it's explained in the manual yet. "merge" is one of the key words.
I recommend the needles since you are publishing on thingiverse and since this will work with pretty much all slicers for all people.
You might need ABS as GPUs can get hot!Edited by Guest
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