Hal that is made from Piano wire and is very strong. I made a frame to wrap it around by driving nails into a block of wood then shaping the wire around the nails. This was several years ago now and I think it took me two tries to get the nails in the right position. But as I said was not difficult once I had my template. I went and looked through my gun room last night and could not find my template so can only assume I have misplaced it when we moved. I was going to make you one as I still have about 30 centimetres of the wire I used.
Just remembered that I borrowed a spring from a friend who had a factory one and that I what I made my template from.
Pete
