@thecabbagedetective
Hello, if deformations are too much prononced in the blueprint, it can be problematic.
You can always taking acount of only one side (right or left) to establish your model, and ignoring the other side of mirror.
But sometimes it’s not enough if deformations are too big. You have to adapt, find references or change blueprint.
I always check my blueprints inside photoshop before importing in blender, and also make my own if needed and if i got lot of references. As you can see above; i took different references, sized them and aligned them in photoshop and assembled in illustrator into one image.
I used the deformation tool in photoshop to match the wireframe design reference with the one just under (éclaté), using layer transparency, because the scans deformed the images if you don’t take care.