"Apple ear buds are in ear and yet they are super annoying for anyone else traveling in the same train cart as the person using them. Makes it hard to imagine these don't leak sound."

"instead, main reason #3 for torx applies: It's a good-looking screw head that functions wonderfully, and for that reason, appears to be the new standard anyway."

""If I said, 150mm, they'd get out a ruler and look." uhm, I'm from a metric country and I can't relate. Must have been the people you were working with I guess."

"I suppose they would only operate on an abandoned single track each where there are no switches."

"However, they would need to make space for those wheels of spinning mass."

"The gyroscope-stabilized monorail train has actually existed before. In principle that can work out. There are plenty of videos about it on youtube. https://en.m.wikipedia.org/wiki/Gyro_monorail"

"My first thought about the dosing cup thing was that it looks like a sharpener."

"Yay another open ear plug design that will pollute train compartments with annoying noise affecting everyone but the one person who actually gets the music out of them."

"Ah now I see, I meant to refer to the second occurrence"

"But in my sentence "its" functioned as the possessive determiner."

"*arrgh should be "its" ... I wish there was an editing option"

"Mh it's cool, but I don't get what's the real benefit. With all the added complexity to enable the coupling of the two vehicles I have the impression that giving the car it's own front wheel and steering unit would be about equally expensive. Albeit with the benefit of actually having two vehicles. Maybe if parking space is limited the combo is appreciated."