What is your tolerance for tinkering? One option, which would give you a lot of control and flexibility over the printer would be to build a Voron. It’s tough to get more “open source” than a fully open source design. The 2.4 is also a CoreXY design and should cover just about everything you want.

Pretty sure that BambuLabs is misses on the requirement:

I want something as open source as possible that doesn’t phone home, and ideally not made in China.

As far as the rest of it, it seems to be happening with every filament I slice in Prusa slicer.

This just reminded me of an issue I was facing recently. I also use Prusa Slicer and was having a hell of a time with my prints. It turned out to be the “Arc Fitting” setting.
In Print Settings - Advanced - Slicing look for the *Arc Fitting setting. When I had it set to “Enabled: G2/3IJ” it just completely borked my prints. Just weird problems all over the place. As soon as I set that to “Disabled”, it cleaned up my prints considerably. Not sure exactly what I’m giving up there, but I do know I’m getting much better prints.

If you haven’t yet, try a cold pull and see if that helps. I personally just do a cold pull every time I change filaments. Maybe it helps, maybe it’s overkill, but I rarely have issues around clogs.

Other things to think about:

1. Does this happen with other filaments? Maybe your current filament is wet and needs drying. Maybe you just got a bad batch.
2. Does slowing down the print speed for infill make a difference? Perhaps this filament is just flowing differently and you need to change the printing temperature, flow rate, or just slow down.
3. How old is your nozzle? They do wear out and a worn out nozzle can manifest as all kinds of wonky problems.

Although thinking about it I could clip the PEI to the glass giving it a flat bed…

Having had a similar issue, actual bed more warped than a TV preacher, and a dead, impossible to replace leveling sensor. I moved to a glass bed. But, now that you mention it, this seems like a great way to get then PEI adhesion and have the bed actually level. Just ordered some larger clips and I’m gonna try this out.

But they pinky promised that only the “good guys” would use the “front doors”. /s

Yes, but that is also going to require a ton of extra effort to track and assumes the nozzles themselves wear consistently. There would probably also need to be modifiers based on materials used, and even brands. For a professional print farm or a business trying to squeeze every last dollar out of the operation, this might be worth it. For a hobby where we expect a lot of waste? Eh, removed it, just replace it when prints start going south.

I don’t know how anyone makes it without a password manager at this point.

Password reuse. Password reuse everywhere.

Have you considered just beige boxing a server yourself? My home server is a mini-ITX board from Asus running a Core i5, 32GB of RAM and a stack of SATA HDDs all stuffed in a smaller case. Nothing fancy, just hardware picked to fulfill my needs.

Limiting yourself to bespoke systems means limiting yourself to what someone else wanted to build. The main downside to building it yourself is ensuring hardware comparability with the OS/software you want to run. If you are willing to take that on, you can tailor your server to just what you want.

I run OctoPrint in a docker container on my home server. They have an official docker image available. And they also have a docker-compose.yaml file available.

I’m quite happy with the setup. The server is more stable (for me) than a small board computer. I have the whole setup on a UPS. Management is dead simple. The only caveat is that the server and printer need to be fairly close to each other for the USB connection. In my setup that was already a given, they sit less than a foot apart because of where I wanted them.

I have wanted to try out Klipper , and may well do that in docker as well, but my printer is a proprietary nightmare and Klipper isn’t currently an option.

I currently do all of my 3d printing from Linux. My printer is physically connected to my server, which is running Ubuntu and has a docker container running Octoprint. The container is based on Debian. The printer itself is a crappy knock-off of the Ender 3. The only issue was identifying the port I needed to pass through to the container… And by “issue”, I mean I had to run ls -l /dev/serial/by-id and put the resulting device in the devices declaration of my docker-compose.yaml file.

My main machine is Arch and I use Prusa Slicer as an Appimage. The only issue there is that Prusa Slicer likes to SegFault while slicing some models with some settings on my system. It’s not common, but it does happen. I think this is related to the Nvidia drivers; but, by using the Appimage it’s just the application which crashes and I can’t be arsed to spend the time to solve the issue. I also tried Cura, but ran into this bug (tl;dr: don’t use Nvidia on Linux). Overall though, it just works and I don’t really think about the fact that I’m on Linux.

For modeling, I personally use OpenScad, as I have all the artistic capabilities of a mortally wounded water buffalo. One of these days, I’ll pretend to try to learn FreeCad, which runs just fine. Blender also runs great on Linux.

In short, so long as you aren’t buying anything too proprietary, you should be just fine.

At the time I stood my server up, I was supporting RHEL at work and support for docker seemed a bit spotty. IIRC, it took both setting up the docker yum repo directly, along with the EPEL repo. And every once in a while, you could end up in dependency hell from something which was at different versions between EPEL and the official repos. Ubuntu, on the other hand, had better docker support in the official repos and docker seemed more targeted at .deb distributions. So, I made the choice to go Ubuntu.

I suspect this is long since all sorted. But, I see no compelling reason to change distributions now. The base OS is solid and almost everything the server does is containerized anyway. If I were to rebuild it, I would probably use something more targeted at containerization/virtualization, like Proxmox.

I had dabbled with Linux before, both at home and work. Stood up a server running Ubuntu LTS at home for serving my personal website and Nextcloud. But, gaming kept my main machine on Win10. Then I got a Steam Deck and it opened my eyes to how well games "just worked’ on Linux. I installed Arch on a USB drive and booted off that for a month or so and again, games “just worked”. I finally formatted my main drive and migrated my Arch install to it about a week ago.

I’m so glad that I won’t be running Windows Privacy Invasion Goes to 11.

My experience has been pretty similar. With Windows turning the invasive crap up to 11, I decided to try and jump to Linux. The catch has always been gaming. But, I have a Steam Deck and so have seen first hand how well Proton has been bridging that gap and finally decided to dip my toes back in. I installed Arch on a USB 3 thumbdrive and have been running my primary system that way for about a month now. Most everything has worked well. Though, with the selection of Arch, I accepted some level of slamming my head against a wall to get things how I want them. That’s more on me than Linux. Games have been running well (except for the input bug in Enshrouded with recent major update, that’s fixed now). I’ve had no issues with software, I was already using mostly FOSS anyway. It’s really been a lot of “it just works” all around.

I print these containers for my basement hydroponic plants.
My wife has also stolen several to use as traditional soil planters.

Building a 3D printer is easy. Getting the details right to build a great 3D printer is hard, as this is where most companies fail. Why?

Because 3d printers are becoming cheap commodities. Those little details cost money and most manufacturers aren’t willing to take the profit hit to do anything more than the bare minimum. It’s only ever going to get worse at the lower end of the cost spectrum and while higher end printers may get somewhat cheaper, most people won’t be able to afford that level of care. The majority of consumer level devices will continue to be just good enough to not get returned but always lacking in fit and finish.

Assuming this is the printer. It looks like it has both wired and wireless networking. Does it work over wired ethernet or does that fail as well?

Ya, my printer leaves a lot to be desired and I had a heck of a time getting even one to print cleanly. So, I didn’t want to have one fail and ruin the batch. I did print the last two I needed together, over night. Was running out of time and just went for it.
Each one was about 4.5 hours printing and 10-20 minutes of cleanup. These required a lot of supports. I did 24 in total.
But, they were a hit at the party, so it was worth it.

Ya, I’ve actually done that in the past. I printed and gave out a print in place bearing fidget toy. This model was a bit ambitious but it coming out pretty well. I also did Among Us ghost key-chains for Halloween one year. Turns out that my 3d printer is mostly just a toy maker for my kids.

While I’m a fan of Kali, some work environments see anything Kali related and go full “zomg! WTF!” Mode. Even in less restrictive environments, it’s often easier to just go with the flow and avoid making life harder for the security folks, without a good reason.