Good point chinnyhill10,
The OSSC will output at 4:3 using the enhanced line modes but the Hauppauge Rocket will not record using any of these.
However, when I get the time I will look again at the various menus and see what is possible on simple passthru.
Now having said that, the cheap 43" Bush TV (from Argos) that I'm using offers 4:3 as an option and I have to agree that the video seems more authentic to the CRT experience when viewed using that setting.
Cheers,
Peter