I gather from Twitter that some people find it interesting to follow my approach and progress when building a new model. So here’s a blog post where I will show how a project comes together, with lots of illustrations.
My starting point is to gather references, particularly high resolution photos, and plans with dimensions. Fortunately this one is covered in the excellent “Rockets of the World” by Peter Alway. It’s not highly detailed, but I find if you can get the overall dimensions of major features correct, then it’s not too tricky to fill in the rest from good photographs.