V-grooves that go most of the way through a PCB are one way to go about this, but a line of perforations along which to snap a tab is another. But what’s the best size and spacing of holes to use?

Pro tip: Don’t use the “Heat and Shake” method of desoldering, and wear those safety glasses. There’s also a lot of detail on how to avoid damaging the PCB during repairs, and how to fix ...

These coins can extend through the PCB to conduct heat to large metal casings, suggests OKI. They could potentially connect to backplates and other cooling apparatus.