I used a similar approach to tailwheel checkouts. When using the T6 with a check flight going into the Mustang I developed a little trick that paid high dividends when applied to other much lighter tail wheel birds.
I'd make the initial takeoffs on an unused runway and have the student taxi out and assume a takeoff position. Then I'd just let them sit there and watch as I directed their attention to the two sides of the lower windshield and how the runway looks when in this position.
Those two triangular visual cues are extremely important to get used to as they represent the touchdown and rollout cue with both sides equidistant and in balance.
When flying the Mustang, this vue is critical. I found it extremely helpful on down to a J3 Cub :-))
Dudley Henriques