orochimaru made the sound nin not so long ago...but

kabuto and his 2 men were SOUND nin spies...but if they "became" leaf ninjas...HOW long was orochimaru planning this??? years?

so that must mean before orochimaru made sound nin, then he had kabuto and the 2 guys beome spies for him and to become "leaf nin"?

then did he already know his village would be called the sound nin?

and although most ninjas fight will their skills and chakra powers...the 3 sound genin used enhancements and weapon add-ons (i guess that kind of goes for the sand nin as well)

ex: dosus sound arm attachment, zakus air cannons, kin's bells...

are they good fighters without it? like in taijutsu or do they know ninjutsus that dont involve weapons? then again...skills arent just what you can do with your hands, its also weapons.