I'm not sure what the possibilities are here, I don't program but I write software development specifications for a living.

There's some cool stuff that might be possible to do.

1. Load current update into the tool
2. Post and edit directly into your update thread.

To solve 1 a link to the players update page needs to exist so the tool knows what to load (link could be a user argument in the control panel that's created when the first update thread is made) . An argument would need to be added to make sure the latest post is the user's, if not load nothing. If that's in place user could load the latest update and modify it as user claims new PT and such unless the user does not own the latest reply to the thread in which case a new post will be made instead of an edit.