Right as rain. And neither will "such-and-such a person has been doing it for fifty years." There are people who've been smoking cigarettes for 50 years and aren't dead yeat. There are people who've been driving cars without wearing seatbelts for 50 years and aren't dead yet. There are people who've screwed around unsafely without the result being a baby or a disease. That doesn't mean any of these is OK, it just means the universe is a random place and some people get lucky sometimes. The problem with luck is it cannot be relied upon. Most of us humans are poorly equipped to discern real patterns from spurious ones; we're wired to see patterns, so we see them whether they exist or not. That's why it's necessary to have data — not guesses, not foot-stamping insistence, not age contests.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

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Franklin
'61 Valiant

A few more threads full of "You should try this because it works!" and "It's an old hot-rodder's trick!" and "The secret Detroit was too dumb to use!" and "Disc brakes weigh 60 pounds more than drum brakes!" and other such predictably ignorant internet-forum chitter-chatter...with absolutely zero data. Not to mention reprints of magazine articles. My little lighting biz has been the subject of several magazine articles. I know exactly how it works. Toss the editor some products that'll fit his car, or buy some advertising in his mag, and you get a great review. In the case of one particularly high-profile magazine, I was told "Send us whatever article text you'd like us to run, and we'll run it." And they did. In the third person, as though I had nothing to do with writing the article.

If it works so well, and in all these many decades there's never ever ever been any actual testing (stopping distance wet and dry, fade resistance, drum structural integrity), then I do believe it's high time one of the proponents of this procedure undertake the task of having such testing done right away. Who knows what we could be missing!

Until those tests are done, though, I'll be steering well clear of scientifically-dubious, life-threatening yee-haw modifications to brake drums. And because I'm selfish, I hope those with whom I share the roadways feel the same. Fortunately for the quality of my sleep at night, this brake dum drilling trick has failed to gain much of any traction in the many decades it's claimed to have been around.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.