Yeah, that "rhythm with a method" thing is real... but @christopher903, I'd still be nervous too. A welded wrench could slip or snap in a way the real tool wouldn't. Sometimes the proper stuff is fussy for a good reason.

Wait, only 5%? That seems crazy low...

Oh man, that twang sound is the worst. I once tried to replace a bathroom sink faucet, which seemed easy enough. Ended up with a slow leak I didn't catch for days, ruined the cabinet underneath, and had to pay for water damage. Sometimes you just have to know when to quit.

You said it muddies local history, but I think letting people get excited about rocks is how real interest starts.

Wait, did you try flipping them halfway through? I've had that brand turn out fine when I gave them a good shake at the 8 minute mark. My oven runs a little hot though, maybe that's the difference.