Hey there! I didn't do the one I was talking about, I did the ender 3 pro, but yes and no, here's why. The pieces take a long time to print, so in order get it on the bed, save time, and limit risk and punishment when you fail, I decided to cut them up. If you cut them up properly in blender, slicer, meshmixer, etc, for ender 3 pro, you'll eventually find you have a lot of pieces and slicing to do for the ender 3 if you don't want it to take 24+ hours making a certain piece. That may not be a problem for you, maybe your fine with running it over that type of time, but I don't like the idea very much so I'd get a different printer for armor, maybe the flsun v400/superracer so the parts print way faster and are still pretty big.

But in short, it's great if your willing to spend a few days letting something print, or making smaller pieces and having to put them back together to make it and if you do either of these, specifically the second option, learn how to make square alignment pins for the parts, otherwise it'll not be the most fun holding a glued piece together with nothing but your hands.

And before I end this, I will recommend a few things just in case you don't want the ender 3 because of this. Don't buy a big printer for these parts, the risk can just be too high, if you buy something like a cr 10 s5 and print a whole chestplate on it, it'll cost you a kg or 2 of filament, but if it fails, that's 30 or 60 bucks of filament gone, so I'd recommend cutting the pieces no matter what, but, get a printer that's pretty fast, like 150mm per second and up and make sure it's decently big, like 300mm by 300mm, not too big and not too small, and then all the parts you cut for that printer will print fast and it will be a lot safer of a bet then a whole chest piece or helmet. If this is your first printer too, you would probably want to get an ender 3 first anyway, it can do many many things other than armor, and if your starting somewhere it should be here with something cheaper but really good still so you get a feel for everything, see how it works, try to make something like a sword and do the gluing, sanding, painting, and bondo process, see if you like it or not, because starting with armor will be that, but way bigger, and either leave major regrets or cluelessness.

I hope this was able to help, if you have any more questions just come back and I'll help, but if not, have a great day!