LOCKDOWN!!!!!! HOW? When???

[conquest780]

Man i have one bantam chicken egg and 4 larger chicken eggs in my incubator. All of them are fertile . Now the problem is that the bantam egg is developing quicker than the others. I expect a day 18 hatch for it. When should i lock down and stop the turner.

 

[tec27]

Lockdown on day 17.