The top is superglued to the base, the components are fitted to the rear with enough speaker wire to slide the amp into the back of the case and the back glued (i used polestyrene cement as this can be removed later). The led may be too bright and the fan spin too noisy at the recommended 20v-24v so i fitted a 100 ohm resistor in series with the fan and a 1.4k resistor in series with the led. The top style with the stripes is for IDEX printers. The Base and feet can be printed as one (sometimes not as pretty) or separately. Use the guide to glue to equal placement at each corner.