Can SuperPCB be used to make boards with parts on both sides?
The answer is yes. You can design boards with parts on both sides. SuperPCB supports a top and bottom silk screens (and for manufacturing has top and bottom solder mask layers, and top and bottom paste mask layers for surface mount parts) . Surface mount parts can be placed on top or bottom layers. Thru-hole parts can also be placed on either side. For a thru-hole parts on the bottom, be sure to set the silk layer control for the part to Bottom as shown. Unless they are symmetrical parts, you will also need to mirror the bottom parts.