Martin,
Thank you so much - crystal clear and will help me move forward on this. I am putting together a Super 8 kit for my son's 18th Birthday because he is a Film student and is frustrated at the lack of 'film' used in the industry these days and really keen to explore the creative potential of a film format. As super 8 seemed an affordable and accessible (just) medium, I plunged in and started buying with zero knowledge (I feel I have had to learn a great deal in a short space of time).
Thanks to people such as yourself that have been ready to offer your advice and guidance, I am sure he will have the kit he needs to start exploring the medium. Who knows, in the next year you may have another enthusiast in the community.
Once again thank you for your help.
Andy