I would like to put opening ports on mine as well.
Cexcalibur: Can you tell what make and model ports your boat has. Is there any identifying info on them?
I've measured my openings and will have to use something that fits into at least a 4.25" by 21.5" cutout. Also, I have angled fore and aft sides so I guess I will have to do some cutting. I think later models have rectangular openings.
