This time around there are no cuts to make. All you need is a record, an oven, some corks, a knife, and an apple.
The apple is very important.
Step 1: Cut Some Cork
When you find four good specimens, cut off a half-inch or so, this part is up to you. Cut one first to use as a guide for the size of the others. Corks can have angled or rounded ends and the cut helps to flatten out one side.