Really need box plans

[Oneinthesac 10+ year member]

i need box plans for 3.5ft3 @ 36hz is what my sub recomends my trunk is about 36in wide 17.5 in tall and 14 or 15 deep i want the port in the back and sub on the middle front if possible. The sub displacement is .231 ft3. it aslo recomends a vent area of 30in2 and a vent length of 18in. so does anyone have the program to calculate this up oh and its a 15in diameter sub. i hope someone can tell me the measurements by tomorrow is when i want to build this thing i tried to look in the free box plans area but the 3.5 @ 35 or 36 doesnt have the picture

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