I'm making a case for my GC portable, and I was wondering about what material I should use. I plan on using PLA for my case with 4mm thickness. For others who have made cases using PLA, did you notice any warping of the plastic when the portable is on or when it gets a little hot? If there is a big danger of warping, then I plan on coating the inside with epoxy or just using ABS. I kind of don't want to use ABS because the prints won't come out as nice, and I'll have to buy some because I don't have any right now.