How to stop the flapping/play of the insides of your Wacom pen (Patreon)

The guts of my wacom pen had enough play in them that it was causing some inaccuracies in my pen strokes. Just a fraction of a millimeter, really, but that play causes a dead zone, which really does have an effect on your drawing and painting. You may not notice now but you'll be like WOW! after you fix your pen. It makes a massive difference. And I've found that even brand-new pens have some play in them. Anyways, I went about making a fix and I built a tutorial from the photographic evidence. Hopefully everyone can benefit.