While manhandling my XP-8600 printer in order to fit a new Maintenance Box, the narrow hinged lid over the rear paper slot came away. Its hinges are not sprung horizontally but are solid projections, though they are sprung vertically. I have spent hours vainly trying to refit it without risking damage by using excessive force, including taking out the double-sided-printing unit (is it called Duplex?) and lifting up the hinges by fingers inserted into the resulting cavity. Can anyone please suggest how I can re-attach the little lid? Thank you in anticipation of help.