Ok simple question that is either so simple that no one has ever tried to get it answered or its just obvious to everyone. I'm refreshing my shower and I am going get a 760×760 enclosure. My question is; do I get a 760×760 tray or do I need a bigger one, like 800×800??? I don't want to take what's there as right because it's been repaired and then had the repairs, repaired so who knows. It going to be a corner opening enclosure... Thanks in advance.