Just like you have done with the BG tool, I would like to see the GB Investment tool also feature the ability to include goods production at a specified rate, along with FP production.
This has already been included with one of the last updates.
The difference is that here you can specify value of goods of current era, last era and 3 eras ago (unrefined goods).
Thanks, I realized after I posted this that mine was due for an update. Much better!