Size/weight limitations?

Would point towards the NTM Pylon motor and either ZTW spider or Afro 30a if it's a smaller project, or one of the Turnigy Helistar motors with a 200A Red Brick if there aren't really any size or weight limits. The latter would want at least 6s but the former would only need 4s

Used both in spinners and they're very torquey motors in that application so shouldn't have any trouble with 600g at 1:1