I am trying to understand the start of this drill. I see 5 piles. 2 bumbers per pile except the back pile making it 11 total bumpers like you said. Then you send from your side the first five. When you send the dog to each pile, you line line and give the back command to each pile correct? You said over , but should I assume you are just calling the piles a the 90 the "over piles". Then step back 10 yards and cast, over, and angle back, left back, right back, angle back and over.