Eight Aspirations and Eight House methods

Dear Master,
Thank you for the wonderful website. I've some questions
which I hope you can help.
Q1) May I know if the Eight Aspirations (Compass) method is
the same as BTB method? Both seem to use the same 8 sectors
convention (i.e. Fame, Career, Knowledge, etc) except the BTB
aligns Career sector to the front door.
Q2) Assume I am using Eight Aspirations (Compass) method,
do I divide each sector like a pie/cake, or do I divide them
into equal squares/rectangles (Luo Shu squares)? Which is
the correct way of dividing the areas/sectors?
Q3) You mentioned Eight House method is a more accurate
method. May I ask what can be done if me and my spouse are
East-group persons (i.e. we share the same set of inauspicious
areas), whereas our HDB unit is a West-group one, and worst,
our Master bedroom is in the Six-Killings (Liu-Sha) area.
We can't possibly be shifting house nor tearing
down our Master bedroom??
Q4) Again assume I am using Eight House method, do I divide
the areas into separate pies or into squares? [as per Q2]
Please advise, thank you.
Regards,
Sean