FWIW, my Cat Stevens 24Kt MoFi Ultradisc was cracked from the center to the CD edge. Not wanting to give it up, I laid it out flat and put a thin line of superglue along the crack. A few days later, after it had dried thoroughly, I played it on my CD player and it worked without any issue. My current player, an Oppo 105D, will play it but you can hear a faint clicking sound inside the player, fortunately not through the speakers. Also, I put superglue on the info side, not the shiny side.