I have in the last week built a lego model of DB V200 diesel engine, has chosen to build Model in 7 knots of width.
I have using the 3794 - Plate, Modified 1 x 2 with 1 Stud been able to use the usual 6 x 28 knots plate in the bottom of Loco.
Have chosen to use SNOT technique to make the nose of Loco, have used 2 engines in the locomotive.
The locomotive weighs 690 grams, after all it is more of a 2 x weight of Loco in the cargo train set 4512.
I found the instructions (in PDF format) on RailBricks page, I found James Mathis's version after on brick shelf.
Photo here:
More photos here :
http://www.brickshelf.com/cgi-bin/gallery.cgi?f=411379