The epoxy used is definitely important as noted in the article. For this kind of work I drill a hole in the board and embed chips in dental resin cured with a blue light. The material used in composite fillings withstands extreme temperatures, so much so that forensics people can find them intact in the charred remains of airplane crashes. It certainly holds up to the heat of a soldering iron. Good stuff to work with, you have all the time in the world to set your piece and takes only seconds to cure.