Spent last night getting COSMOS running on my Centauri Carbon 2

Put the same build on my Centauri 2 a couple weeks back and had a similar run. The USB update went fine but the calibration took way longer than I expected, closer to an hour on my machine, so don't panic if it sits there a while. My first few prints after were honestly a mixed bag til I dropped the flow rate down a touch in the web slicer, then things clicked. The part I like most is being able to check on a print from my phone while I'm at work. My dog knocked the door open mid print last week and I coud watch the whole thing unfold and shut it down remotely instead of coming home to a spaghetti mess. On the RFID spool reading, I tried it with some older tags from a different brand and most of them read but the material info came through wrong. Might save yourself the frustration and just manually enter your settings until you see others confirm your tags behave.

Also second the advice about keeping that credentials file. I almost formatted the stick before noticing it. Made a folder on my desktop and threw a copy in my cloud storage too.

Funny enought I went the other direction with mine. Flashed COSMOS on my CC2 back in January, messed with it for about three weeks, then rolled back to the stock firmware. Nothing wrong with the update itself, the USB install was clean and calibration matched what the second poster said, roughly 50 minutes on mine. I just found I was spending more time fiddling in the web interface than actually printing. My backlog of functional parts kept growing while I tweaked retraction numbers that didn't need tweaking.

Rolling back was easier than I expected. Grabbed the stock firmware file from Elegoo's support page, dropped it on a spare card, same offline update menu. Took about ten minutes and my saved profiles came back intact. The one thing I did lose was some fine tuning I'd done on the input shaper side, so if anyone else tries this route, screenshot your settings first. What I actually miss from the COSMOS build is the mesh view. Seeing the bed map as a heat gradient made it obvious my left rear corner runs low, which stock just hints at. I ended up printing a thin spacer to stick under the glass on that corner and my first layer is more consistent now even back on the old firmware. So yeah, both ways work fine, it realy depends wether you want a printer or a hobby.

Still waiting on my CC2 to show up so I'm reading everything I can before it arrives, and this whole COSMOS thing is a bit over my head as someone who's only ever used a stock printer interface. Is the web UI something that only works when you're on your home wifi, or can you check prints when you're away from the house too? I'd like to set that up on day one if it's posible but I don't want to mess with router settings I don't really understand.

Update: glad I read the replies before running mine, the calibration did sit for ages so that heads up saved me a panic. Prints are still a bit of a mixed bag though, some corners look rough. To the poster who rolled back to stock, was it quality that pushed you or just preference?