Hello, I want to build a aerial multicopter can carry about 15 pound weight, I found that the Freefly ALTA is a UAV optimized for up to 15-pound payloads (From its overview https://store.freeflysystems.com/collections/alta/products/freefly-alta?variant=6239333249). Who can tell me what's its flight controller name? Did a lot of research, DJI Naza-m lite and AMP flight controller were highly recommended by a pilot from his article http://www.rcdronegood.com/flight-controller-board-comparison/. I know both of them are okay, But which one is the best one? DJI Naza-m lite or AMP or ALTA flight controller? Thank you.