We made a spongeless refillable cartridge from a regular HP 63 cartridge. Detailed steps and troubleshooting methods were demonstrated.
How to make a SPONGE refillable cartridge:
https://youtu.be/EjVIqurJEJo
How to "Drill-n-Fill" an HP cartridge:
https://youtu.be/EjVIqurJEJo
Related topics:
hp envy pro 6455, hp refillable cartridge, hp 67 black ink error, hp 67 xl