Hi mick ,sorry i missed this but heres a bit more info for you . The square recesses in both doors are spring loaded foot steps, in the pic where both doors can be seen open youre looking at the inside surface so you can see the footstep as a recess , the other side ( exterior facing ) is flush . The pic of the aussie beaufighter with the hole in the door just shows that the footstep has ben removed/ lost . The rear door is similar to the front in operation , ie pivoted in the middle and folding down from the front edge so the visible part is actually the inside surface. On the rear hatch the area covered by the front part of the door and visible when it swings down would contain the oil damped struts and latch . Heres a few pics from the modellers datafile hope this helps , cheers tony