Brick Blog:

We don't share many train techniques on this blog, so today we're looking at how you can use simple parts in a complex construction to make a very accurately sized train design. The builder wes_turngrate also shows his interesting method of working out the shape - by tracing the train's cross section. Make sure you follow his account on Flickr here: https://www.flickr.com/photos/141280199@N02/49491357416/in/photostream/