Since I needed several cases for the Arduino Mega 2560 with ramp board, I roughly recreated the electronics and then invented this straight and airy 80's design around it.The three case parts are just plugged on top of each other. If you don't like that, you have to fix it with removable glue (like Fixogum).The pictures with the grey background show the best orientation on a FDM printer.(lower part upside down, middle part standing normally on the 4 guides, upper part display surface pointing horizontally upwards - print everything with support structure, scale in Z - e.g. 101.5% on ender 3)Michael from 'teaching tech' would say: 'Happy 3D printing . . .'- - -'7027' / SolidWorks 2017 / exclusively designed for 3D printing