Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to break in a softball bat [title] Make sure your bat needs to be broken in. [step] Fast pitch softball bats that are 100 percent alloy, or that have an alloy barrel, are good to go right away, with no break-in period needed. Composite bats, however, have carbon fibers that need to be loosened before the bat reaches optimum performance.

Ending1: The fibers can be loosened during just one break-in session that will take about an hour. [substeps] Many fast pitch players hesitate to use a new composite bat in the middle of season, thinking that the break-in process is too time consuming. Ending2: Find out how you should modify the position of your bat. [title] Put on rubber gloves, goggles, some apron, and gloves that are 2 inches (5.1 cm) wide. Ending3: If you're not able to break in an e-blade bat, you will need to cut it into manageable pieces for the next level. [title] Examine your bat's body shape and pattern. Ending4: For more information, read : [substeps] Composite bats are used primarily to help you do drills and cannot be directly modified to fit into the tackle box. Composite bats are also made of plastic to assist with speed and organization when planned.

Answer format: ending1/ending2/ending3/ending4