This is a bit of a tricky one........and I can't figure it out.

Attached is a strut for which I need to get the flat pattern. It's a an imported IGS file. Converting this to sheetmetal is not working: it doesn't like the transition between the flat ends and the curved middle.

Does anyone have any advice on how to get this to work? I'm thinking that it may not unless it's fully modeled in sheet metal. Please advise. Running SW 2010. I can get this in a native SW part if that makes it easier.

Thanks in advance!