Jeff, this idea of a "preventive maintenance plan" has surfaced elsewhere in this thread. When I got to thinking about it, it struck me that perhaps it isn't really feasible. Look at it this way. When manufacturers design sophisticated machinery like this, you must assume that they think carefully about maintenance, and what parts of the machine should be user-serviceable and which not. Think of the number of things you buy where there is a notice in the manual or engraved on the unit itself saying "There are no user serviceable components in this product", or "The opening of this panel by unauthorized service personnel voids the warranty" - all to the same effect - intended to keep people with no training or inappropriate training out of the innards. Whatever maintenance they do think is safe for most normal untrained users they include in the manual. Having seen what I've seen in this thread and perusing the reference materials people have made available here, my sense of the matter is that Epson has most likely decided very consciously what is user serviceable and already provided for it - as laid out in the manual, the software and the LED panel. I personally would not even attempt to change the wiper blade in my 4900 if that ever became necessary for example, as straightforward to the unsuspecting that may sound, because of what needs to be done to access it, and the risk of expensive collateral damage I could do trying to save dollars on a service call. There are economies that are real and economies that are false, and the theory of comparative advantage actually has practical merit.
