I have a web article about building a 55n3 gondola at:
http://www.55n3.org/cars/convert_gondola/ (http://www.55n3.org/cars/convert_gondola/)
(http://www.55n3.org/cars/convert_gondola/image/0053000_finished.jpg)
(http://www.55n3.org/image/narrowed_gon.jpg)
Thank you if you visit
Harold