This is where users can discuss dtr2 editing and make requests. Please note that most track editors are busy so if you request a track there are no guarantees it will be made, but it certainly doesn't hurt to request. You can also ask questions about editing.
Requests chassis in here from the editors that post in here. Especially if you have a league that would like to run a new chassis. Again, no guarantees, but chassis are less time consuming to make than tracks usually, so there's a better shot.