So I printed the same box (3 layers on bottom .5mm layer) and vase mode sides .8mm thick, in PLA. I left the door of the enclosure open and the front of the box lifted a bit but is still usable. Did not happen with the lid as I closed the door for that job. The PLA (not clear, eSun pla+) is a bit stiffer than the petg as expected which is better for a box.. just have to make sure it is never put it too near anything too hot.