Need a little help with custom box please.

[Scotnemily]

Can anyone confirm my ports and tuning on the box? I have tried a few calculators, some give me a longer port length than 12" each. One said 54" the box is slightly larger than 3.0 cu ft. After the ports subs, and braces. It may be as much as 3.1, I have to check. I figured this would be close enough to not notice the difference

Sent from my iPhone using Tapatalk