That is almost certainly where they came from. There was a yogurt bar in dining services with an assortment of fruits and granola. My favorite are the blackberries in vanilla yogurt. They seem to always have blackberries.
The Mahogany tail block must fit tightly to the very slight curve on the end of the guitar. Both sides of the block on either side of the centerline are darkened with graphite. A piece of self-adhesive sandpaper is attached to the inside of the body form, and the block is carefully rubbed against the paper until only a very faint line down the middle remains. I stop and check frequently to ensure the block is evenly sanded top to bottom.