Besaid Sphere Hunter??

Hmm, got Besaid key and get a chest containing sphere search. Get all 4 mini comsphere. I get x3 number 8 and x1 number 6. So..err what is this? Where to use this thing??

[Boco]

Go to that cave in Besaid. On the left there's another door that leads you to a chest that contains a garmend grid I think.

Thanks dude..Will find that place

[Gobble Vamp]

it's a six? i thought it was a five...oh well.