commodore 64 PSU power supply case

This is my 1st design
I haven't worked out the best way to print this, Any help post in the comments.
Thanks

edit
added a version 2 with thicker walls

edit 19/10/19
added a version 4 with a curved inside top so able to print the right side up with still loads of room.
added a version 5 with a chamfered inside top so able to print the right side up with still loads of room with no supports