I've been using A Curtis plow (V4208A 72") on our Kubota RTV 900 for about eight years. It's the model that moves side-to-side hydraulically but has an electric lift. The plow has two heavy duty springs on either side. Last year, I saw that one of them had been stretched or pulled to the point where it kept falling off. I replaced it (not cheap), but now the new one is doing the same darned thing. Has anyone else had trouble with these springs? What do they even do? Can anyone think of why one spring would keep stretching to the point where the end isn't curved enough to stay in place. I tried putting the curve back into the end with a sledge hammer, but couldn't get it to budge.