Thank you Steve. I have been searching the forums over the past few months and found very useful information. The springs are a bit expensive to bring in to South Africa. We are leaving on a tour next week in the 1914 T and a friend has a 1915 that was restored from scrap in 1973. He made his springs from the original remains, so hopefully I can get some measurements there. Detail prior to the upholstery being fitted is scarce, so I might have to improvise. As long as the outer appearance is correct, who will know the difference!