[Pete] had a friend who would powder coat metal parts for him, but when he needed 16 metal parts coated, he decided he needed to develop a way to do it himself. Some research turned up the fluid bed method and he decided to go that route. He 3D printed a holder and you can see how it all turned out in the video below.

A coffee filter holds the powder in place. The powder is “fluidized” by airflow, which, in this case, comes from an aquarium pump. The first few designs didn’t work out well. Eventually, though, he had a successful fluid bed. You preheat the part so the powder will stick and then, as usual, bake the part in an oven to cure the powder. You can expect to spend some time getting everything just right. [Pete] had to divert airflow and adjust the flow rate to get everything to work right.

With conventional powder coating, you usually charge the piece you want to coat, but that’s not necessary here. You could try a few other things as suggested in the video comments: some suggested ditching the coffee filter, while others think agitating the powder would make a difference. Let us know what you find out.

This seems neater than the powder coating guns we’ve seen. Of course, these wheels had a great shape for powder coating, but sometimes it is more challenging.

[Dylan] has a fancy bed that can be set to any temperature. Apparently this set him back about $2,000, it only works if it has Internet, and the bed wants $19 a month for anything beyond basic features. Unsurprisingly, [Dylan] decided to try to hack the mattress firmware and share what he learned with us.

Oddly enough, it was easy to just ask the update URL for the firmware and download it. Inside, it turned out there was a mechanism for “eng@eightsleep.com” to remotely SSH into any bed and — well — do just about anything. You may wonder why anyone wants to gain control of your bed. But if you are on the network, this could be a perfect place to launch an attack on the network and beyond.

Of course, they can also figure out when you sleep, if you sleep alone or not, and, of course, when no one is in the bed. But if those things bother you, maybe don’t get an Internet-connected bed.

Oddly enough, the last time we saw a bed hack, it was from [Dillan], not [Dylan]. Just because you don’t want Big Sleep to know when you are in bed doesn’t mean it isn’t useful for your private purposes.