|
Gaara has control over all sand. That includes regular chakra controlled sand and the special sand from his gourd (which is the same thing as armour sand and shield sand btw). The only exception is if Gaara tries to harm himself. If he does this, then the will of the Shukaku (or possibly Gaara's mother) overrides his control and protects him. For this same reason it is unlikely he can completely remove the gourd from his back, since it not only carries the sand but is made of the special sand itself. If tried to remove it would just continue to follow him in the form of sand. So he can use it just like any other sand, though Deidara notes it is much faster and deadlier when he uses the special sand.
As for losing other Sharingan abilities while performing MS, that remains to be seen but I don't think it works that way. It seems like Kakashi would've pointed out this weakness when he was talking to Itachi or when he used it himself.
|