The LushOne is a great little analog synthesiser that comes on several PCBs. This thing is a modular rack to hold those PCBs. The rack takes two PCBs vertically, and as many as you want horizontally. You can find out more about the delightful LushOne here: http://lushprojects.com/lushone/I printed it in PLA, 4 perimeters and 15% infill. It is a large item, so expect a small (but very acceptable) amount of warping unless you have a heated bed. Alternatively, you could try turning your fan down to allow the layers to cool more slowly.