Permissions questions about "broadcast" and Commons overrides

Commons is great jumpstart for a complex networking site, and also rich in example code.

It would be helpful if Commons included a list of brief statements about the tweaks and changes made the move it from standard Drupal.

I find I lose many, many hours trying to understand something that is new to me and also different from the current Drupal. This is because searches for self-help can be confusing and inaccurate.

A case on point is trying to understand permissions for editing a "group" type content. I have created a new content type and set it as a "group" type and was trying to allow Authenticate Users to edit the content, wiki-like. This looks to be a problem because of OG, but also Commons overrides in commons.module and perhaps other Commons scripts. I am still hunting through the code reading functions.

Also, in permissions, nodes appear under "features" and "nodes". Personally, I would like to see Commons more of a wizard assembled Drupal than something different that is extending Drupal. I have been suggesting to a few that they look to drupal.org and other searches for Drupal like help, but this can be poor advice if the issue is Commons specific.

Regarding "Broadcast". It seems to have appeared in the tabs for my new content type and I can't see where Commons has toggled it off for Groups content type. Where would I look?

Thanks, Jerry