I'm adapting a model from Thingiverse, to have square holes in the sides for a USB cable to come out. I'm not a great modeler, so I'm not sure how to input structural pieces for overhangs. So, my other choice is to build in a break-away piece that can be popped out with minimal effort. Problem is, I tried to have a .25 mil space all around the section, thinking it wouldn't put much material in there, but it did, and I broke my print trying to get it out. I know this sounds long winded and such, but if there's a better way, please let me know. I tried a dremel, but it didn't look as clean.
Attachment 1986