That was my mistake -- I wired mine with an HDMI 1.3 + rear speaker cables to the ceiling from the floor (wood flooring kasi pede via floor), running on a 1", I'm stuck with it now that i plan to go HDMI 1.4.
ok ang 2" na PVC (forget flexihose), straight paths ang layout and ask that the joints be scored and use contact cement para walang galaw sa joints come hatakan.
Take pictures before they close the ceiling, para you can go back and review.