Colorado Pompeii-Thermometer/door help!!

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hello from Colorado!- 42" pompeii coming along well but I coul really use some help with a couple questions from you experts out there!
1. I am looking at the remote thermometer from FB. The pompeii instructions say that I should mount the probe into my cooking floor while the FB lady said that it shoud go into the dome about 6" from the floor. Any thoughts? Is this thermometer worth it? Do I go with 4 thermocouples to a digital reader like one in the floor, others in the dome, etc
2. I am looking at having a door made for my oven in the style of the old FB door (no longer avail) that was offerred as an option for the pompeii. I am thinking of having mine made 22" x 13.5" x 1/4"to account for a 1" door stop. I heard some folks making door with slotted vents. Any thoughts here? is 1/4" thick enough??
THANK YOU SO MUCH!