I'm not sure how Nurbs is in Blender but with Max I am box modeling but in a different way, with simple forms and shapes, and with my stack being kept I can work on the low poly end while seeing the high poly result...a different way of problem solving for sure.

I created an engine the other day which was straight box modeling, the only Nurbs is the manifold section. I still have some fine detailing as well as the exhaust pipes to do.

Comitted to excellence through art.