Here are useful links that we recommend for unanswered questions:
Nustream Blog (http://www.nustreamgraphic.com/blog/): Different blog posts about a wide range of subjects rooted in the print industry. Color management, proofing, prepress workflows, CTP and more topics are covered by industry experts.
GMG trueColors (http://www.gmgcolor.com/gmg/library/truecolors/): A quarterly publication that looks to cover the full gamut of color management. It features case studies, informative articles, product launches, interviews and ‘how-to’ articles.
MY X900 (https://myx900.com/): Extensive archive of user experiences fixing hardware issues on x900 Epson printers. Most notably tips to unclog your printer's print head but also maintenance tricks to keep your Epson printer in good shape.