I tend to use my .75 mm nozzle to make large items.. granted it does not looks as nice but if you design the part with the extrusion width in mind (.8mm) it can work really well. With .5mm layer height it gets done much faster even at 30mm second.. I don't sell my stuff so as long as all the holes line up and the thing is strong does not mastter what it looks like.. I prefer ABS for boxes, that way I can tap the holes and use M3 screws to hold on the lid and boards.