Iimbonakalo:
1. Ubukhulu bomzimba we-silo bungenziwa ngokungenamkhethe ngokweemfuno.
2. Umthamo omkhulu wokugcina, ngokubanzi iitoni eziyi-100-500.
3. Umzimba we-silo unokuchithwa ukuze uthuthwe kwaye uhlanganiswe kwisiza.Iindleko zokuthumela ngenqanawa ziyancipha kakhulu, kwaye isitya esinye sinokubamba iisilo ezininzi.