I printed the cover and it had the seams from the base to the wall so thin that they didn't connect all the way around. I thought maybe it was because I did no top or bottom layer. Meanwhile on my second Prusa I did the TPU cover. I could se my scraping blade between the gaps from base to the wall as you can see in the picture. The bevel is nice looking, but it's killed the strength of the print. Plus even the outside case is too small for my 13, or maybe it was just my printers. (edited)