You can print as many as you want. They can stack to eachother. (1x1s are not compatiable with 2x2 directly, they can tilt)

I tried all of them with my Flashforge. I used OrcaSlicer.

0.2mm layer heigth is enough but you can use lower. You need support for these. I use snug support rather than general grid support. Result and cleaning are easier.

If you support me. https://buymeacoffee.com/codi

Thanks a lot.