[Colin] uses some spare boards to lock the target board down to his bench and then uses a custom stencil and solder paste to prep ... so it could be reworked by hand). He also melted a header ...

Soldering pin headers by hand is a tedious task ... with an X-Y movable table and a Z-direction represented by a soldering iron and solder feeder on an arm. The solder feeder uses a Bowden ...