Question about crack in shower surround and buying used.

The crack was caused by a to tight bracket that holds the shower head. The surround was installed correctly but they did not leave any wiggle room, or elongated hole for the bracket.
Mine done the same think this year and looking it over this was what caused mine.
So just make the hole with a slot rather than making the screw tight. On my last trailer I had the same thing happen, and I used some crazy glue and it held. just line up the edges best you can.