I have an OS FS91S spring # 45960200 - the spring broke before flight. I tried ordering a new part but they discontinued it. I ordered the OS FS70 - FS91 spring # 45960210. It came in today. I looked at the spring and the new one is slightly wider. I tried slipping it into place but it was a real snug fit. doesn't just drop in like the old one. You guys think it is safe to use?