The sides of a sports racquet, and optionally the tip and throat bridge, include axially extending cutout portions. The method includes detecting an oil temperature of the transmission for the vehicle and determining whether an oil pump has been driven for a set time or more based on the detected oil temperature. It is well known that periodic redistribution of skin pressure can help prevent some of the negative effects experienced through extended usage of beds and chairs. The elastic piece pushes the projectile-loading block to slide toward the barrel when the slider module slides forwards, thereby pushing one projectile into the barrel while closing the projectile chamber.