How should i do a motorized sealable box?

Hey guys! I am trying to think of the best way to do an electronic motorized seal for some ports im considering adding to my box... due to space restraint, ill have to go with 4 1.5" PVC ports per side (yeah i know, its scary buy my ONLY option without reduing 100+ hours of work). Basicly ill have them come out the 2 sides of my box, and on the ends ill make MDF roundover areas so its smooth and flows like the river. On the ends, i want to put some type of "door" that can close or open at the flick of a switch to go from ported or sealed, so i can do SQ in sealed and open up 45Hz tuned ports to hit my cars peak during SPL compitition. There are many types of motors but i dont know what will be strong enough to hold say up to 8 hours strait to keep it sealed! Actuator? Trunk release magnetic systems (what are these called?) Servo? Another idea i had was to use these motors and have a latching system, so the motor didnt have to be on but to open or close the port system... just have one pull the door shut and the latch hold it closed, then have another motor that will pull the latch and springs will open the door up. Any ideas would be GREAT!04 dodge neon SXT

(2) Oz Audio Matrix Elite 12"s sealed in 4 cube fiberglass enclosure, powered by HiFonics BX1605D

Oz Audio Matrix 180cs 6.5" component set power by HiFonics ZX4000

Good deal! Where did you get them? And do you think they will keep at least an 8 hour hold constantly?04 dodge neon SXT

(2) Oz Audio Matrix Elite 12"s sealed in 4 cube fiberglass enclosure, powered by HiFonics BX1605D

Oz Audio Matrix 180cs 6.5" component set power by HiFonics ZX4000

It sounds like you want to create a system like SVS home subwoofer enclosures have.

Damn that would be great! Test those suckers and see how good they really are! :D SVS does this eh? Any schematic on their design by chance?04 dodge neon SXT

(2) Oz Audio Matrix Elite 12"s sealed in 4 cube fiberglass enclosure, powered by HiFonics BX1605D

Oz Audio Matrix 180cs 6.5" component set power by HiFonics ZX4000

I did not get a chance to do it last night but will try today and keep you posted (had to install my new alarm).(1) Kenwood Excelon Head Unit KDC-X589 (24 bit Burr Brown DAC, 3 X 4 volt RCA).

(1) RF Punch 250A2 - running the components.

(1) Hifonics 6.5" Atlas Components (18db crossovers).

"SVS does this eh? Any schematic on their design by chance?" SVS does it, but you have to manually change the port plugs. You can lower/raise the tuning frequency depending on how much/many of the ports you block off.