I've been working on optimizing the Topper a bit, which has involved starting from scratch and remodeling the loft a little smarter.
...But it's getting complicated. There's *way* too much here, and this is a stripped down version of what I had last night.
Basically, NURBS surfaces kinda suck - building this loft is a PITA. I would try this in Fusion 360 with T-splines... but I'm hesitant. Last week's version was pretty close to where I wanted it, and I thought that I could rebuild it quickly and move on. My work this morning will tell whether I was wrong.