I have the 7500DT for the last four months The paper auto select don’t work. the presets don’t work. It cannot remember the combinations I ender and recalls randomly anything. Every time I have to MANUALLY select paper and tray (tray1 DL , tray2 A4 , tray3 A3) Or else it can print a A4 from the Word in the tray1 DL or A3 ,Everywhere but the tray2. The same goes for every application, CorelDraw Photoshop etc (from internet explorer through the web interface I have set all the trays papers) Also, I have to set the plain papers (120gr) as thick card stock or else the toner falls of the paper. (there is no humidity problem, I have 3 HP besides the XEROX share the same paper with no problem. So I have a 7500 with the speed of four to six paper per minute.