This is based on CBiker's great design. I love the simplicity and especially the screw-free cover locking mechanism. The two main issues I had were 1. I don't need the expanded base and prefer a cleaner look; and 2. my XU4 is easily popped up inside the case when plugging in and pulling out cables.
In this remix I removed the expanded base (those who need it can download the original) and added four poles to the cover so when closed they perfectly push down on the PC board. I also adjusted the power plug hole and added a small slot to access the sd/emmc switch. Finally I adjusted the small tube so it fits perfectly on reset button and in the hole in the cover. Enjoy!
P.S. Odroid XU4 is perfect for retro gaming. It will perfectly emulate any console up to the Dreamcast (80%-100% speed). If you are buying, official website odroidinc.com is the cheapest. Don't buy from Amazon. Retropie for the XU4 is inconvenient. I recommend batocera.linux instead.
For Kodi I recommend Odroid C2 which has hardware decode for H265. Pi3b+ doesn't work on H265.