I am trying to setup a 1270 that i have that i am going to give to a friend. it there an easy way to take off the lenses to check the raster condition? i can get at 3 of the 4 screws on the outer 2 lenses, but the other screw are ridiculous compared to my barco. do any of the other pieces swing out of the way? does the whole lenses assembly swing away?