so just finishing build and have some questions. My ceiling isn’t flat so how should i fill void of screen from top of one corner to other corner where it is about 1.5” lower? Also what is best way to fill screen from projector? I did test pattern to get the top and bottom to fill then did a custom resolution like 2700x2160 to make it fit the sides. Is this a good way or not. Projector is benq 936st