After a bit of work and some digging I’ve been able to add the waste ink kit installation instructions for the RX420. Along the way I’ve also been able to identify a number of other printers that use the same case design and waste tube pathway.
This guide now covers installation for these models:
– RX420, RX425, RX430
– CX3500, CX3600 CX3650 CX4500, CX4600
It’s likely that there are a number of DX printers that will also use the same approach but as yet I can’t confirm or deny.