"It's creative for sure, though rounded carbon-fiber 'knuckles' don't seem like they'd do a lot of damage (they should be plenty strong enough to carry a bag of groceries, at least)."

"Doesn't look technically too complex, quadcopters get their stability from spinning two rotors one direction, and the other two the opposite direction (diagonally), this design spins the upper rotor the opposite direction from the lower (easy to see in the dumping-water video clip) instead. The only not-off-the-shelf piece of engineering I see is the central shaft that couples  the two props plus motors to let the spin while staying connected."

"Hmm, non-replaceable flash memory doesn't sound like a great idea, even with a good controller I would expect wear to be an issue over time."

"For me it evokes the trend of slapping giant touchscreen head units into cars, instead of a simple connection to a phone that can replaced / upgraded. Yes it's "ugly" to mount just the things that you want on your bars (I have a bell, light, and GoPro, but I am commuting every day...) but it's also modular and you can easily move some or all of what's on your bars to other bikes."

"Hmm, seems like e-waste in the making, the hell of consumer-grade routers is that they only get support (bugfixes, primarily) for a couple of years and then they're just a sad security nightmare. I don't doubt Korea Telecom will exist in 5yr, but will they still be keeping these alive?"

"Looks like some of the walls are hollow, I assume they run conduit and pex in there?"

"Hmm, the barrel jack for power instead of usb-c pd seems pretty retro. Also wondering what the micro-usb-a (labelled "SERVICE") is for?"

"All in favor of three-legged chairs, better on uneven surfaces, and they use less materials, what's not to like? (Ok, stacking is trickier...)"

"Does seem like it's quite possible, the Swiss watchmaking industry was born as a cottage industry, perhaps it's more that there were clockmakers in Germany who also happened to raise crops in the warmer months..."

"They look great, and the nested double-basket bolsters for the bottom three is a nice solution for providing more support where it's needed. The ergonomics look a little off to me, you can perch on the front of the chair, but leaning looks like it would be hard on your back."

"The 2x2 Ultra Bike looks to be 100% an electric motorcycle - no pedals?"

"I have a simpler jeweler's pin vise I got years ago from Lee Valley:https://www.leevalley.com/en-us/shop/tools/workshop/workbenches/vises/31175-jewellers-pin-vise?item=60F0501Fewer pins means it can't fit on all sides, but the wider jaws are handy."