Toolrunner Joakim is headed to EuroMold so is going to be hard to contact until that show is over. However, I watched this video yesterday
"http://www.youtube.com/watch?v=hW6gTI7Pe1Y&feature=player_embedded"]YouTube- madCAM Simultaneous 4 axis and stock models
And it clearly shows stock model for the 4th axis, but you are correct in the listed differences, it is not available. I will shoot Joakim and email asking him to come here and address this directly, hopefully before he gets back from the show.
Now for your first question. What type parts are you making, if you can share that? Depending on what you produce, you may not need remachining. I have it, and have never needed it for my production, but then again, I mostly cut wood.
I hope this helps a little.