If soldering small items is a problem try fixing it while solder the first pin.
There are some slightly different HAA15-0.8-A Power supply out there. Mine is different from this: http://www.cs80.com/crowbx/psmod.html
Mine has a slightly different layout. I used two 2k2 Ohm resistors. parallel to R52 and R79.
The Voltage is now adjustable between 8- and 20Volts.
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