Just received a background and ledges from Universal Rocks for my Sonoran boa's new enclosure and I'm getting ready to install them. I was planning on drilling some ventilation slits through the background with a dremel to match those on the back wall of the enclosure, but the background is a bit thicker than I expected and I'm not sure if I'll be able to make the slits. Some pictures for reference:





I'm wondering if I should just skip drilling the slits and put up the background as-is. I would think the extra vents I had put on the sides should provide enough ventilation for a non-bioactive enclosure with a one or two potted plants, but this is my first PVC enclosure and I'm not sure. Those who own PVC enclosures, what do you think? More pictures with the background propped up for reference:





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