101 is fine for still-air. We have to remember that the heat sits in the top of a still air incubator. The heat reaching different parts of the egg can be different due to these physics. Bypassing scientific evidence that even temperatures at 102 can lead to a high hatch rate. The problem with still air is that if there is no auto-turner, the opening and closing for adding water and/or turning results in a abnormal fluctuation in the natural thermal cycle taking place in your incubator. Late dead, meaning chicks that have died after pipping can be related to other things such as thin shells, thick shells, or even disease.
I would say the best thing you can do is add a pc fan to your bator, which is extremely easy and cheaper than the fan kit. Before I added the fan, I would rage from 97 in the mornings to even a few times coming home at 103 or 104. I worked out a cycle towards the end of that batch of turning down the thermostat before I left. Now I barely mess with i, but find 99.5 or 99.7 every time I check.
I would say the best thing you can do is add a pc fan to your bator, which is extremely easy and cheaper than the fan kit. Before I added the fan, I would rage from 97 in the mornings to even a few times coming home at 103 or 104. I worked out a cycle towards the end of that batch of turning down the thermostat before I left. Now I barely mess with i, but find 99.5 or 99.7 every time I check.