If Extrude1 must be there, you could use the Flex tool like the file I have attached. This is not a sheet metal feature, so it needs to be supressed in the flat pattern configuration to work. Kind of a mickey mouse way to do it, but that is the only way that I know to do it.
Jan, what's the need for Extrude1? You can't really have multiple thicknesses with sheet metal.
Steve