Didn't know if i should put this in general disscusion or here but as it's CAP related i figure here is the best place, I'm currently trying to make a custom bowl, i'm using the curved planter plaza pieces upside down for the top platform/coping and one section has turned un-grindable , as you can imagine a bowl with ungrindable coping will suck balls. anyone know what causes this to happen? too many merged pieces? and anyone know how to fix it without fully rebuilding / designing that section?