2 super easy tricks that will get you out of cleaning after drilling.
There is an alternative to normal drilling, and its called “Flow drilling”. Instead of using cutting edges, flow drilling uses heat to melt a hole in thin materials like sheets of metal or plastics. The benefit of this is that the sheet is less likely to crack and the melted material forms a “sleeve” (insert) that increases the thickness of the material around the hole. This sleeve can then be threaded, making separate nuts unnecessary and simplify assembly. In this demonstration from arduinoversusevil, a heat-resistant cemented carbide drill is used. But if the material you want to drill through has a lower melting temperature, like aluminium or plastics, any pointy harden steel shaft will work just as well. You could even use a normal drill bit, turned up-side-down and grind the shank end into a cone in order to use this technique!