Rajah Caruth’s visit to the Dover Motor Speedway on Sunday was special. Not because it is a strong track for him — it’s really not — but this weekend marked the first time he had a genuine chance to create a lasting memory at a track that already meant so much to him, having watched races there as a child while dreaming of winning there someday. But despite making a strong start in the race, his run ended in disappointment. Caruth’s emotional me…