I have put more wire through draw plates than I can remember although I have not ever had a need to draw Chenier, I now require some 2mm OD x 1mm ID and of course no one makes it. Plan was to simply draw it down as I do with wire, one of my mates who works it a large engineering factory suggested that I will need to draw it over a mandrel or the tube will collapse, any forum members who shed any light on the process.