I'm working on a part and have run into an issue with it's strength. If i print it as a solid item, it does the job perfectly but it's obviously using a lot of material. If I print it with infill (50%), it's great except for one crucial point which breaks on every test.    So the question I have (which I think I already know the answer to) -  is there any way to print a part with 50% infill overall, but have a section(s) where it's solid ?    If this is not possible currently