[ehnto]

The crowdsource page says it has refillable ink tanks rather than cartridges. Unless they are modifying HP cartridges, which is probably not smart from a legal standpoint.

[tjohns]

The tech specs say it uses HP 63 cartridges (or HP 302/803 outside the US), and that the cartridges can be refilled using a refill kit.

The photos clearly show HP cartridges installed.