After my N4's back glass cracked, I decided to replace it with ebony. After a couple of weeks and LOTS of work with a dremel, a guitar headplate, and some superglue, my baby is ready to be used again. The back adds about 3/32 of an inch to the thickness, but without back glass and with a screen protector on the front, I don't really need a case as much anymore! Here are the pictures: http://minus.com/lyYVG2d86lVg2 http://minus.com/lpbHisLVybhPe I still plan on lacquering/polishing it a little more, but I must say that the wood adds a GREAT feel to the back. The lighting doesn't quite do it justice.