Hi Mr Lee, A typical HDB 3 room flat's design has missing corners at 2 sectors. I am faced with 2 choice of flats: 1. For a North 2 facing flat, it hasSW & SE missing sectors, with main door at SW with M6 W1 but six killing sector. Main door facing can see the edge of opposite flat, but not pointing at main door. 2. For a South 2 facing flat, it has NW & NE missing sectors, with main door at NW with M5W2 andtotal loss sector. I have 2 daughters and breadwinners belong to East group. Please advise. Thank you.