The picture above shows the dropouts pushed to almost 180mm. I started with pushing them to 150mm, but that sprung back to 125mm, so I had to go further. Pushing the dropouts to 180 mm caused them to spring back to about 132 mm. It takes very little effort to push the dropouts apart the additional 3mm to get the hub in. I have not yet checked to see if they have been moved equally. If they have, I'll probably leave the spacing at 132mm. If not, I can move one chainstay the extra couple of millimeters to get things centered up. By my eyeball, I think they are pretty well aligned. As shown below, the frame has been "stretched" to about 132mm. (Although you can see the all-thread in the dropout in this picture, the nut on the other side has been loosened all the way.)
I'll reserve most of my writing on the hub itself for another post. My first impression is that its weight is substantial (almost 8.4 pounds!!). It is clearly built to last, and is an impressive piece of machinery.