I am trying to accomplish a process where the middle of my print is a lot stronger than the other part. If you look at this picture I am trying to do something similar (https://i.ytimg.com/vi/zhTVpmk297U/maxresdefault.jpg)
The other part of the print I want my infill to be about 30% and as it gets close to where the nut is I want that infill to be 100%. I know how to do the process changes for levels but have never done it for something like this where you need just the middle and about 4-5mm from the middle to be at a higher infill, this way the nut will have a stronger core.
This picture is just an example to get my point across, the actual print is going to be about 300mm with the nut in the middle. I am not going to print that entire piece at 100% just to get a stronger middle.
Does anyone know how to accomplish this?