I haven't done a deep dive into infill yet, there are so many to choose from. I usually just let the slicer decide. I usually just adjust the density to my desired level of strength. I know I'm going to have to learn more about it though.
I have been messing with it on and off with various prints. Especially ones that I have unintentionally broken or failed. I don't have any good advice at this point but it is interesting reprinting something you broke to see if it will work better or break differently the next time around.
The sledgehammer is just to increase infill and not care as much about patterns (patterns do still matter more than you think) but that it my non-expert opinion. I just read a bunch and screw up more often than I intend to ;)
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