Thanks for the explanation. I don't understand the chemistry too well but get the principle. I'll give this a go once I can get some sodium thiosulphate.
I didn't know about the Scala 200X. That's a quite exciting prospect as it has a good reputation amongst still photographers as a reversal film. I see Wittner recommend rating it at 100ASA and using D94a.
If working in Super 8 pays off for me then I'll consider investing in a bulk system.
Tofek, where is the best forum for discussing Super8?