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Well, two of the 11V Zener diodes were missing, and one of the 15V was just bad. The circuit diagram is difficult to translate to the tabs provided, so frequently found myself switching between the schematic and layout diagrams. Built it out, substituting and making a couple of minor changes to the circuit for the missing 11V Zeners, and I was able to get B voltages within a few volts of the reported output. Good enough.
A little more attention to quality control before they ship out the door, and maybe a couple of minor circuit changes, and I'd have given this a 5 star rating instead of a 4. All in all though I'm pretty pleased with the overall kit and it was fun to build, just not totally painless due to a two missing and one dead-on-delivery diode.
