OK guys, apparently, the problem was that there wasn't a good connection somewhere, and the flexwatt wasn't even heating. However, it is now heating fine since I discovered that issue. Temps are stable, thermostat is not constantly on trying to heat. Top 4 tubs are remaining a good constant 89-90 degrees (there's some variance in tenths of degrees between those 4 tubs, but between 89-90). The bottom tub is only reading around 87, so I have ordered a bit of 4" flexwatt to add to it along the back wall along the bottom; hopefully, this will correct the cooler spot at the bottom.

The good news is, this incubator was not intended to be used this season--I was merely getting everything together and testing everything out. For purposes just like this. Cool spot? OK, we'll fix it. Not warm enough? We'll fix it. As I said, I was not opposed to adding more flexwatt if needed, just wasn't certain it was warranted at the time. However, once I got the flexwatt heating, it did seem to be doing the job with the exception of a cool spot at the bottom. So I am now going to add additional flexwatt in hopes of rectifying that issue.

Believe me, I know I've had a few temp drops during incubation in years past using my hova bators, but I've had no birth defects or otherwise unhealthy hatchlings. If I can produce healthy hatchlings from hova bators (and several clutches over the last 4 years, I might add) with 100% hatch rates, this one should definitely be better than what I've had. While I know that eggs should most certainly be kept in as tight of an incubation range as possible, eggs can withstand some slight changes in their environment, as long as those periods aren't extended for long periods. I'm sure that while females in the wild try and choose the most suitable place, you can't tell me the temps in those areas never drop at all overnight at least on occasion. If the temps drop 2 degrees when I open the door to check on eggs, and re-stabilize after 10-15 minutes (or less), I really can't see that hurting any of the hatchlings. I know I've had temp drops slightly larger than that for longer periods when using hova bators, and all of the hatchlings came out perfectly healthy. This incubator is definitely an upgrade for me--anything is an upgrade compared to a hova bator.