This has be asked a couple of times in passing, but I thought maybe I should make a dedicated thread about it.
The Production Wheel for planets is going away. Full stop. Keep the complaints or celebrations to other threads, please. 
What I decided to do is while we still have it to look at, to find just what files, XML or otherwise, possibly reference the Production Wheel and see if there might be a way for the serious Hard Core modders to mod it back in (BTW: "NOT IT!!!" 
). I realize that we might not know exactly what to look for until it is taken away (which is why I am making nearly complete backups to see just what is changing pre and post 1.4). But at least identifing what XML files, Art Projects, Window Pane settings, and yes, even schema might, just might, give some folks ideas on how to actually mod it in.
Might be a pipe dream. Probably IS a pipe dream. 
But instead of sitting around and seeing the semingly neverending threads about this, I figured why not try to see what we can document right now.
Here are all the current files I found that have the word "Wheel" in it, excluding the conversation triggers found in the Tutorial:
UIText.xml (data/English/Text/)
ScreenControlTypes.xsd (data/Schema/Lib/Enums/)
Screen.xsd (data/Schema/Lib/)
FrameArtDefs.xml (Screens/)
GovernPlanetWnd.xml (Screens/)
ProductionSubWnd.xml (Screens/)
Might be other things running around that I missed since I might not know everything I am looking for. But at first glance, IF the XML files in the Screen directory can be modified and IF schema isn't altered in such a way as to make it unavailble, then maybe, just maybe it could be modded back in.
My biggest worry outside of the schema being changed to make it undoable is how the planetary screens themselves will look. There simply might not be any viable screen real estate to try to put a modded in wheel.
All of this is, as I said in another thread, waaaaaaaaaaay beyond my capabilities. But it might not be beyond others. So consider this a thread to see what we can find out about the Planetary Production Wheel and then see if there is anything like it that can be modded in post 1.4 for those who really really want it.
And if it turns out that there is nothing that modders can do about this? Well this thread will sink soon enough then. 
