This is the assembled V-Dub pc board with all parts in place. A quick test revealed it was providing 16.7 volts at 8.7 milliamps. There is always some loss because of the series diodes, so the voltage cannot quite reach 18v.
A test of the negative voltage output gave -9.0v when driving an LED with about 5ma. There is no diode drop on the negative output so it gives the full voltage.