Hi, I've created & uploaded some test images which should enable anyone to tweak their print settings for best output, even if you have no access to specific ink/paper profiles.
Each consists of a standard test print, surrounded by -/+ CMY/RGB/lighter/darker variations in 5% increments. Think printable version of Photoshop 'Variations'. Once printed, it should give you some idea of what colour settings need adjusting in the printer driver for best results.
Pic 1: +/- 10%:

Pic 2: +/- 15%:

Pic 3: +/- 20%:

Best,
Ed.
Each consists of a standard test print, surrounded by -/+ CMY/RGB/lighter/darker variations in 5% increments. Think printable version of Photoshop 'Variations'. Once printed, it should give you some idea of what colour settings need adjusting in the printer driver for best results.
Pic 1: +/- 10%:

Pic 2: +/- 15%:

Pic 3: +/- 20%:

Best,
Ed.