power supply box with strain

I added strain reliefs for the cables, the strain reliefs are optional. With optional strain reliefs the box is enlaged accordingly and two lids are printed to fasten the cables. For thin cables mount the lids upside down. Don't overstress the lids and the threads, fasten the lids carefully. Use M3 countersunk head screws. The screws heads will retreat in the bottom, minimizing the possibility for scratches at the table top. If strain reliefs are omitted, the box resembles more or less to lar3ry's remix.