I had one of these several years ago.
Man what a sweet rocket, it seemed to have the perfect combination of style and great flying characteristics . I flew it on many sizes of motor in single deploy only. My best flight [altimeter in payload] was 5100ft with a 5gr CTI.
You will definitely be "cloud busting" with that J 575! Yes, definitely a tracker is needed. Mine was eaten by the "CORN" gods in Iowa. Wish I had built it DD.