nice work yours. We should suggest Doyusha to make opening doors like on the 707 models (LH, Luftwaffe, AWACS, AF1) and a Combi or all freighter 747. Just to show the inside area, I opened the doors (two ones on the left side of my next 747 , PIA, now under construction)
something of the interior part is available here:
http://www.geocities.com/the_1_100_airliners_web/page46.html
another already made model with an opened door (by me) is a DC 9 TDA:
http://www.geocities.com/aeromobile_fr/fr-toa4.html