My 1280 -- which is new -- was also leaving tracks on my Museo Silver
Rag prints, so I removed the "pizza wheels" in just a couple of
minutes. It's very simple -- undo two Phillips head screws and remove
the slotted metal plate over the wheel row and snap out the wheel
assemblies toward the rear (there are three, if I recall). No washers
were needed.
There are instructions online:
http://www.inkjetart.com/pizza_wheel.html . Do not be intimidated by
the detailed narrative. This is a very simple task.
All the best,
Craig Roberts