A page width printhead assembly for a digital inkjet printer has a support member that can be secured in the printer, and a printhead that can be mounted to the support member. The cushioning is established with the cushion insert positioned through an open forepart of the Texon. Another coupling uses magnetic force, rather than a direct physical connection, to form a driving connection between a drive shaft and a driven shaft. 3 relative to pure SiO2, an outer cladding with a refractive index delta \u0394Outer-Clad, such that \u0394Outer-Clad>\u0394rMIN; and |\u03940\u2212\u0394Outer-Clad|>0.