I'm up to 100% hatching from this clutch. I use a modified hovabator without a fan. I modified the hovabator by getting a fish shipping box of the same type as the hovabator base and cut the bottom out of the hovabator so that it makes the hovabator taller.
Hatching multiple species I have over a 100% hatch rate so far using the hovabator (so far this year, possible double het (albino-orange ghost) ball pythons (4 out of 4 eggs), 3-toes (5 out of 5 eggs) and Phelsuma laticauda (2 for 2).
Ed