Originally Posted by Garage19
Marc,
You don't need a tube notcher. You can get the best fishmouth finish by using a program called tubemitre.
Google for it and the download.
Same as this I think.
http://www.metalgeek.com/cgi-system/...atic/cope.pcgi
Never used it myself as I bought my cage already profiled but it looks a good little tool if your stuck.