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3. Make sure that the felt pad that presses the tape against the head is sufficient. The larger the pad the better the tape to head contact allowing for better quality recording. Even a slight separation between the tape and the head will result in a poor recording.
4. Pins and rollers are also important. The rollers are what guide the tape around the corners of the cassette. The pins hold the rollers in place. Some manufacturers will use plastic pins. This has the potential of the roller and the pin becoming welded under heated conditions. Also, if the rollers are of cheap quality, the tape may not move smoothly while recording or copying. The tape can even become damaged due to friction.
5. Slip sheets are the sleeves between the tape and the case. These are also important since they help the tape to travel smoother. Smooth travel of the tape is critical to a good recording.
