Most of the active builders subscribe to the Stewart 51 mailing list and associated website supported by Yahoo/groups. This has taken the place of the S51 newsletter (the Rivethead) published under the auspices of Jim Stewart. The group is "unlisted" and is currently restricted to S51 kit builders or owners, either current or former. It is not open to the public, however much of the website content of potential interest to non-builders is mirrored here.
If you are a current S51 builder or owner and would like to subscribe, e-mail me at osmith@seas.ucla.edu. In your e-mail include your name, the source of your kit (Jim Stewart or a former builder) and the kit serial number if you know it.