UPDATE:
So... I finally added the fans to the shelves, I am not doing slits as I will just keep the fans on at all times on a low setting to make sure there is proper ventilation. Also I will not be tilting the shelves.... I may tilt a tray with some super premiums in it, but not all the boxes for storage ext. as it would decrease the amount of space. I have come up with my plan for my electronics in the humidor and this is how it is going to go...
I will have two circuits. One will be running my LED lighting system, and the others will be for humidity control... This is my description of both:
System 1: I have 3 pressure switches in my possession that will be added to the tops of the doors so when any door opens all of the lights in the humi will turn on. Not only this, but I will have a 4th 'master' switch in parallel as well that will be able to leave the lights on when the doors are closed. I will be running many white LED's throughout the shelving, hence why I made the little 1" overhang on the fronts. I am probably going to use a potentiometer (Essentially a dial) inside the case to control the brightness of the LEDs.
System 2: Get ready to cream.... I have been thinking this through for a while and I am getting close to my final concept, and am starting to program this soon (this weekend maybe). This system will be controlled by a PIC micro controller and will give me temperature, humidity, and control the fans.
Fan / Humidity system: I am going to make my own active humidification system. I will set a box of distilled water, or propylene glycol solution in the bottom shelf of the cabinet with fans on either side, so when the humidity sensor on the top of the case sees that it is getting to dry, it turns on the fans to this box, and all of the fans in the case to 'high'. This will cause the fans blowing across the top of the water or solution in the box to pick up humidity forcing it throughout the case. When the humidity sensor gets to its ideal point, it turns the box fans off, and the 6 in the case to a low setting.
One may be asking 'what is the ideal setting and how is it chosen?' I am going to have another potentiometer or dial, to set an ideal humidity, which will be displayed in a green 2 digit 7 segment display on the top of the middle door, the actual humidity will be displayed in blue right next to it. Finally I will be displaying the temperature in a set of red 7 segment LEDs as well.
When all said and done I will have an automated system for controlling the humidity that I set, it will tell me the temp, and have a kick ass lighting system.
Any questions?