So after a bunch of trial and error fitting and eleventy-billion screws, the inside covering is nearly complete. I still need to do some minor tweaking to the back door wall and make the more complex pattern for the forward portion of the roof, but it really feels like I’m getting somewhere now.

The fluting works great and is keeping the covering from distorting the horizontal stringers. I don’t want any distortion, otherwise the outside compound curves will not be right.