RE: Possible overheating of the MK4 electronics case inside an enclosure with summer temperatures?
I think there is no need to move the heated air from the board to the outside of the enclosure. A fan on the electronics case is enough. My 80 mm fan is probably already overkill for this. A smaller fan like a 40 mm would probably be enough for this. The important thing is to move the air over the chips on the xBuddy board, as well as putting cooling fins on the stepper driver chips. I have been using my fan mod for about a year and a half now. During that time I have printed a lot of ASA and some PC-CF parts. The overheating error has never occurred again and the board temp is about 20 °C lower than without the fan.
Also I would not like to create a fixed mechanical connection between the printer and the enclosure. The printer could shake loose during operation and will create resonances with the enclosure, I think.