This is my first time heavily using the loft feature, so bear with me...

I'm trying to create a thin loft feature using a guide curve through 2 sketches. From sketch24 to sketch 25, guided by sketch 20. Is there a way to have the cross sections of the loft normal to the guide curve? Without this, the geometry thins out too much, and I have to maintain a minimum cross sectional area. I'd really like to use a 3rd sketch (sketch27), but Solidworks says using it creates invalid geometry. The loft feature will work through the two sketches, but the thin feature won't.