For long threads like this one, it's useful to go back to the first post and update it with a view of providing an overview & "index" to the project to date. Possibly with links to significant milestones within the thread.
This is helpful if it's linked from the home page and you get a lot of "new" readers.
See the Metro boat tail prototype thread first post for example:
http://ecomodder.com/forum/showthrea...mpg-10691.html