I also have purchased a 8" i3v printer which I am waiting with baited breath (old fish story). My concern about the enclosure is the heating of the electronics. The stepper motors can take the low level heat from the heated printing glass but the Arduino and Ramps 1.4 boards might not like it a lot. It might be better to create an enclosure that allows the electronics to be moved on the outside either the back or under it. We would also need to move the power supply outside.

Bob