The R3000 curves and install command are not included with the QTR download, but you can get them along with setup and installation instructions, here: http://www.piezography.com/PiezoPress/technical-support/epson_r3000_installation/
Here are two K7 curves I've made for different K3 printers using different K7 ink tones on Canson Rag Photographique paper, which can be used with any K3 printer model (R2400, R2880, R3000, 3800/3880, 4800, 4880, 7800/9800, 7880/9880 and 7890/9890). Try them out to decide which you prefer.
Best regards and happy printing~ Dana
9880-NEU-CANragPhoto.quad.zip (2.81 KB)
2880-SEL-CanRagPto.quad.zip (3.16 KB)