Remanufacture HP C4127X toner cartridge (http://www.skysheen.com)should destroy the shell of the toner cartridge, so please be careful to minimize the damage. Following pictures will show you how to remanufacture it.http://www.skysheen.com/support/toner-cartridge-faq/images/C4127x_re1.jpg
http://www.skysheen.com/support/toner-cartridge-faq/images/C4127x_re2.jpg
http://www.skysheen.com/support/toner-cartridge-faq/images/C4127X_re3.jpg