Panasonic RQ-SX67V (RQ-SX75V) Walkman belt replacement

Hello. I was a bit disappointed with this walkman at the beginning because of the design of the playback head assembly that has the playback head attached only to one pinch roller as the other pinch roller is held together by a tiny spring and I thought that was the reason for when listening to cassettes only one side sounded good, the one with the pinch roller attached to the playback head. But then I was like... Wait. that doesn't make any sense cause when you insert the cassette the playback head goes inside the cassette making it hard for the playback head to move sideways. there's a lot of Panasonic models with this mechanism. then I was like, you know what whatever. then months later... something beautiful happened. I remember that I was playing one tape, the same tape over and over with the same results. see kids this is what you shouldn't do at home. always. ALWAYS test your players with different tapes and always ask yourself, what if? learn from my mistakes. Anyway long story short now this walkman sounds amazing both ways. with other cassettes, except for the one cheap pianos cassettes. I do recommend this walkman if you can find one or one with a similar mechanism. Anyway. THANKS for watching guys. I appreciate it.