Re: 870 wingmaster detent & spring?
The correct tool actually swages a ring around the circumference of the hole for the detent.
A good, sharp prick punch could be used as long as it is swaged at several points along the circumference. A much more difficult process than using the correct tool.
The autonomic nervous system provides for involuntary muscle function - the work of breathing, digestion, and so forth. On some folks, that's a pure waste of ingenuity.