congratulations on the fix and getting some boost buddy. If it mainly happens when you are stopped (the smoking) it may not be your turbo it may be your valve stem seals in the head, which under the right circumstances can be done with the head on the car. Fixing that is much faster, cheaper, and easier than replacing or rebuilding a turbo, even if it's not the problem its one less thing to worry about on the 7mgte later.