Hello again user.
1,2 and 4 work perfectly. It seems ok adding a MIDI track but not quite so happy splitting an existing track. But I've now got the menu options, drawn in some automation and it works exactly as I'd hoped. Many thanks for all your help.
Any ideas why this would be? Could it be that TTS-1 is a multi-track synth where the others are single track? It's weird because I'd searched the web like mad but couldn't find any info or any other people having problems with it. If not don't worry, we've got it working now and that's what matters.
Thanks again.