some time ago I came across an interesting video made by group of Swiss mechanical engineering students, who reverse engineered a XJ600 engine and created a 3D model.
[youtube][/youtube]
It seems to me like they did a really thorough job, thought I would share it. Somebody here might find it interesting or even useful (technically, you could even print yourself a nice model

Here is a link to the STP file (there are some free STP viewers), the only slight downside is that half of the captions is in French:
All credit goes to the authors!