Hi there.
I have a standard setup, OctoPi 1.1.0 on Raspeberry Pi 3B, and I'd like to get rid of one of the wall plugs.
I read around thar RPI might be powered by feeding well-stabilized 5V directly in the 5V rail via the GPIO pins.
Is something like this or this stable enough to do this or I'm traying to fry my rpi?
I'm planning to get the mains directly from the printer's power switch.
Just an FYI, these links aren't working for me (in Colorado). If the link text were changed from this to the name of the product, those of us having problems might be able to "search" our way out of it 
Yes I think I'm going with that one and fit it on the back of the printer, my first thought was to get the barebone and fit it somewhere under the printer's main body but there's already the rpi under there and it's getting too crowded.
@b-morgan it's a link to aliexpress for a Meanwell RS-15 5V switching PSU
Most printers have a 24V main supply, I have used these in my Voron builds with good results.
The packaging makes them easy to mount.
Tought about it, but I'm also planning to add a relay to switch off the printer from Octoprint (to reduce the noise - my printer sounds like an helicopter at takeoff even when idle), so I can't rely on the printer's PSU
Any thoughts on silent fans?
