Bad Piggies Flight in the Night Bonus Level 4-VII (4-7) can be 3-starred with a single contraption, but two runs. The vehicle is 3-boxes wide with a bellow on either end, both sets of balloons, and a fan on the underside. To beat the clock, quickly pop two balloons and go rightward. Use the fan to push the contraption up faster once you have cleared the overhang. For the star box, go to the left, nice and slow.
If you have a different strategy for completing this level feel free to leave a comment below.