Hi guys
Thanks very much for the appreciative comments!
I just hope my particularly picky Design Principles lecturers like it as much! (Drs. Ian R Farrow and Askin Isikveren, if any fellow engineers on here might have heard of them..)
DH106, the software is Autodesk Inventor Professional 2010. Its pretty good but soon starts slowing up on you when you put in as many points and dimensions as I had to do on those drawings. Oh, and the splining feature has a mind of its own as far as modellling complex curves goes...
603DX, that does indeed look very much like a 35! I actually had to fire up Inventor and check for myself, it turns out that its just a very pixellated 11272.2!
Regards,
Matt