Could I talk somebody into taking the spring band from their 4x5 nikor tank and tracing it edge wise on paper and posting it with a couple of measurement points? Just got the long term loan of a tank in really good shape, but the band is gone. Or/and,,, has anyone used the tank without the spring band, or by using a rubber band or something else? I'm not too bad with metal work, and have a friend with a lot of machine shop and sheet metal experience, and access to stanless sheet of various thinesses, so I'm really not worried about making one myself.