Sealing off Trunk Box

[FiNaLaLmAsY]

hey guys! i been doing install and boxes for a while but wanna try sealing off my 02 nissan sentra

i have 4 dd3510f's on about 4.5k

41.5 wide, 16.5tall and 25/26 deep. to work with. 8.33cu total..after bracing and woofer displacement about 7.79. Is there anything to account for? im aiming for a 35hz tuning and will 1.5cu per woofer still hit the upper end? or is thier a certain tuning i should go for being im building up pressure in the cabin instead of the trunk? and if i shoot around 16sq per cu am i gonna still hit the lows being i have the airspace? also if i do a top slot port is there a rule of thumb of port opening i need? because i can do 40 wide and about 2.25 of height for a port and thats around 15 so sq per cu.. any help be great thanks!

this is what i cam up with