Hi Micdrow,
I have the same drawing in a WW2 Aircraft drawings book. The dimensions are nice, but have a few issues when actually plotted like I did to build a 3D model for Combat Flight Simulator. The dimensions don't quite match the drawing itself. Also, the resulting model doesn't quite match photographs of the real thing though differences are VERY slight. It is close enough that unless someone pointed out the detail differences, folks probably would not see the result.
I believe they are the best that are available though.
- Ivan.