[milquetoastaf]

There was a big HN thread a few weeks ago on open source 2d printers. It seems the biggest bottleneck would be the nozzle designs

https://news.ycombinator.com/item?id=24786721

[exabrial]

Oh interesting! That's why I think the "design a printer around an accessible cartridge", or starting with a laser printer would be a better approach.