Greetings hermitnerd, all Mellotron strings/flutes/harpsichord/piano are Nord but anything at all rhythmic is Arturia and anything that sounds like it may be a VCS3 is definitely Arturia. All else will be shared amongst the Arturia, the Alesis and the Mg. Sorry there's no more detail but I didn't take proper notes of the recording on the Cubase tracks (like I normally would) because I didn't know it was going to grow into a piece like this when I started it and then I had to re-use tracks to make it more manageable on my pc screen which makes it all the more confusing to work out.
Thank you.
Chimpy.