The thing to remember with this article is that He is maintaining the humidity in the room at 50 percent. My house is air conditioned and the humidity is at about 25%. He says open the room to keep the room a constant temp, but if I do that there is no way I can maintain that kind of humidity in the incubator room. It is much easier to control the humidity in the incubator. If you are keeping your room humidity up instead of putting water in the trays, then yes, you need to keep out the plugs because the heating drives out the humidity and you have to keep up a higher air flow to keep the humid room air coming into the incubator. I found you also have wider temperature flucutations from the higher air flow. But in your case, Garden Gal, your temp is great, your himidity is wonderful, why change? My first hatch was in a still air hova bator without a turner, with the plugs in and it was 100% hatch rate, I have never done that again. Actually I was thinking about going back to still air.
