Sounds good! I would suggest using a stainless tubing for your u-bent part. Using a plain steel will corrode in no time & get weak. You can buy thick wall stainless u-bends on Ebay
With schedule 40 or so,, thick wall tubing , it will support the turbo much better. They are already chamfered & ready to weld.
You can buy schedule 40 stainless tubing or plain steel from McMaster Carr.http://www.mcmaster.com/ They have different angled pieces to fab your U-bend pipe. Or get some ideas here: http://www.sdsefi.com/tech.html