This is what we did last year Mike. We only did 3 clutches (a total of 18 eggs) but had a 100% hatch rate so it must have been okay.

We used 6 qt sterlite tubs. I mixed vermiculite and perlite together using the following formula - 2 parts vermiculite to 1 part perlite by volume. Once it was well mixed together I added incubator temp water to it - if you don't have room in the bator for a water jug just use warmish tap water. I used this link http://www.ballpython.com/page.php?topic=incubation but found for me that I didn't need quite the 50/50 by weight of water to achieve the desired "feel" to my incubation medium. You have to mix and mix and mix some more to get that water right the way through your dry mixture. If you think you've mixed enough...mix more LOL. You want that liquid as evenly distributed as you can get it.

Basically it should clump in your fist when you squeeze it but then immediately collapse when you poke the squeezed mass with your finger (if that makes any sense). Experiment and you'll get it right. We filled each tub about halfway full of the incubation medium.

We placed the eggs in the tub being careful to neither roll them or seperate them. I made a bit of a depression in the substrate and then once the eggs were placed, just shoved some of the substrate around but not covering the eggs completely. Then I put on the Press N Seal then the lid. Then a sticker on the lid with relevant info (sire & dam, date laid, number of eggs, date of 30 days, date of 45 days, date of 53 days).

We would open the tubs, lift an edge of the Press N Seal and do a quick check on the eggs and air exchange once weekly until day 45. At day 45 we removed the Press N Seal, put a few vent holes in the lid of the egg box and started opening the boxes once daily just for a quick moment. We cut on day 53 and at that point very lightly misted the cut eggs twice daily until all hatchlings left their eggs.

Hope this helps.