Welcome to the new watt-32 group. Everything that was at the old Yahoo Groups (that I had access to) is now here.
The previous messages from YG are archived in the Archive section in the Files area. They are in JSON format and bundled in a ZIP file. The plan is to eventually translate them to HTML format for easy access. There is also a separate section for Attachments that were posted with a few of these messages.
The links at YG are now in a table called Links, in the Databases area.
Note that the first message from a "new" member is moderated, then after this is approved, subsequent messages are not. This is the standard modus operandi here at GI.