I have made my own too. I keep my hand turned still air incubator at 102. I don't bother with humidity. They still hatch pretty damp ( look for my water dishes.)
the little dish below is all I use till lock down, so almost a dry hatch. Copper penny sterilizes water (1982 or younger)
18x18'' box lined with foam 15 w bulb. 70 degree room.
I have gotten almost 100% hatches out of these but my last hatch was 16/17 but we had 3 power outages too.