Bob,
People will still take the teardrop and try to align it with the back of their truck's cab and the top of the tailgate. Instructions, in words, are needed.
Besides, the latest drawing steers you in the right direction, with a buildable design that's worth emulating.
While I had photoshop open, I took some measurements. Assuming 24" tires, the car in the template is 56" tall, or 1.05 Insights. The distance from the front bumper to the 80% mark is 18', or 1.11 Accords. I like it.