I am trying to set this up with the Factory default settings. According the manual the PJ is "factory pre-set to operate on the ceiling for a front projection with a 100" screen 4/3 format and a projector screen distance of 290 cm". Question: which part of the PJ is this distance measured from,is it from the middle of the green lens? or is it from some part of the ceiling bracket? Once the PJ is parallel with the screen,should I carry out "DEflection Center" I am not able to line up the RED and BLUE with the GREEN. Any help will be appreciated.