Attaching the spike to the PCB was as simple as adding a circular copper pad on the obverse side, applying some solder ... in this design are bare copper, a light purple for mask over copper ...

No user-serviceable parts inside? Give me a break! The head unit is tough to get to, but the PCBs within the chassis use ...

After all, for most products, the delicate electronic components on that PCB ... solder issues during reflow. But there are also more serious concerns, such as the enforcement of design ...