Your incubation method sounds great, although I'd be a little worried about the amount of condensation and humidity for desert lizards species like Uromastyx.
It is interesting though how tolerant reptile eggs are and how little many reptile breeders realize this. I think humidity is way over rated. I worked at a reptile breeding facility for 5 years and we hatched hundreds of reptiles with great success in an incubator that ranged from only 50-85% humidity. The eggs included colubrids, bearded dragons, chameleons, ball pythons, Burmese pythons, retics, all types of tropical and desert gecko eggs, Uromastyx, basilisks, tortoises, jungle carpets, and more that escape me at the moment.
I think in artificial incubation for most reptile species the optimal range for humidity is about 80-85%. Otherwise you are more likely to have condensation problems & mould, especially if your have close to 100% humidity. The only way to eliminate that risk is to have a lot of ventilation but then it makes it harder to keep the humidity & temperature consistent.
Ventilation and temperature may be a little over rated as well. I have hatched bearded dragon eggs that cooled to the high 50's-low 60's at night and rose sometimes to the low-mid nineties during the day. And incubator ventilation is less important than egg container ventilation. In my experience, if you have an incubator at least 3 square feet in size then just opening it once a week for a few seconds is more that enough for most species. Provided that the egg/nest containers have ventilation.
Moreover, I have had colubrid, leopard gecko & bearded dragon eggs that were dropped/fell from 3-4ft down to the floor that still hatched with perfect little babies!
With this said, I am aware of some species that have very sensitive egg incubation requirements. Off the top of my head, San Estban Isle Chuckwallas, other chuckwalla ssp., South African & Madagascar tortoise species, also some chameleons sp. I believe that the problems that commonly occur w/ desert lizards such as chucks and uros is having too much humidity, these probably do best w/ only 50-70% humidity and very little ventilation so it stays consistent. If the humidity goes down because of too much ventilation, even for a short time, it may never go up enough for the eggs to recover from the loss of water that occurred.
Anyway...just some of my thoughts and experience...
Greg
