Finding old stuff like that can really hit you in the feels. Time capsules are so cool because they freeze a moment from your past. It's amazing how a simple map led to fixing things with your sister. Stuff like this makes me want to dig through my own old boxes. Happy for you both getting back in touch.

Watching sparks fly near an airfield is never a good sign. You're right to be worried about safety codes being ignored. Backyard repairs on planes are a whole other level of risky. It's one thing to fix a lawnmower, but a Cessna engine? That's asking for trouble. Self-regulation sounds like a good idea, but who's going to step up and do it? Hopefully, someone takes notice before something goes really wrong.

Yeah the bag method @christopher_johnson85 mentioned never worked for me, stuff just ends up a jumbled mess at the bottom. Having it on the wall means I actually use the brush before the cloth, instead of just grabbing the cloth because it's on top. My microfibre cloth used to get covered in pocket lint in my bag.