It'll be about a month before you see your turbo if everything lines up. Dennis had a problem with getting the correct castings, so he/we are waiting on them now.
I have the latest tune and so does Leo. IMO for daily driving you don't need a tune, if your after more power....ect the tune will help. I have not towed with mine maybe Leo has by now?
All I can say is the truck is so much nicer to drive with the proper size turbo on it.
Also as a benifit to OBDI ATT buyers the tune is $100 less $250 instead of $350 and can be purchased at a later date, so try it without a tune then if you think you need one let me know and you can have your cake and eat it too.