I shaped the stations the same way as on my last build. After sliding them onto the beam, I was surprised at how well everything lined up.
Leveling, squaring, and plumbing all the stations actually seems to work.
This Bow&Stern arrangement worried me a little, but I now think its actually easier than what I had to do with the ladderback. One problem was that I could only view it from this side-too heavy to turn over, and the I-beam blocks the view. I think/hope its straight.