From what I have read never did it myself. Yes that is all you need to do to go external. welding is not easy on the exhaust side so if you do not have the proper skills to do the job have a shop do it for you could not cost to much maybe at the max 100$.

I know it is dsmtuners.com but good information.

http://www.dsmtuners.com/forums/newbie-forum/221019-how-do-external-wastegate-internally-wastegated-16g.html

Finish? What is this "finish" you speak of sir? Dsm's are never complete just temporarily put together.

97 eclipse gone but never forgotten Ill miss you money pit.