Step 5: Hollow Out a Small Cavity in the Core of the Golf Ball

Once you are ready to place the micro SD inside the golf ball, you need to remove a small amount of the core so you have room for the card.  I would recommend doing this with either a large drill bit or a chisel.  You should hollow out more then enough room, to allow space for the padding that you put on the card earlier.  
This could be a awesome geocache!

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