Thanks Darkness, that's interesting, though I suspect that the very early ones did also have the smaller piston feeding dual discs.. Something to look out for.
As it happens I am now sorted for masters, thanks to my good mate Jonzi.
He mailed me as I was typing my ad and offered the masters from his single disc 600SS, which will be absolutely perfect.. They are destined for my Commando.
Thank you Jonzi..
