Hi John,
The group you should belong to is Spacewalker@yahoogroups.com.
The principle plans owner (I think; things change sometimes) is Martin (Marty) Hone <aerobiz1@gmail.com>;
Please try that and let us know if you have any difficulty (been a while since I've been in the forum or contacted Marty)
Thanks,
John Bruesch
Spacewalker II project in Iowa