Timewasting???....research Trev, research
When I came out of the mob (many years ago) I went to design college, specialised as a precision scale modelmaker.
For one of the technical/industrial projects we had to do I built a large scale model of an ejection seat...photos long gone I'm afraid :-( I wrote off to Martin Baker and they sent me a huge pack of info, including details for kit makers...what seat was fitted in which aircraft, etc.
I think this has been posted before, but click the photos to download pdfs....
Click
ATB,
Derek