Thanks Magnus,
Am just tryign this, but I've noticed that Creo craps out when the angles aren't 90°. In my particular case, this methods works until the 3rd edge. it's not 90° to its neighbor, more like 150°.. It looks like the bend radii run into each other & don't play nice..
So, back to solid, shell, conversion, and then add my flanges & miters by hand.. that works. this, no.