But all F1 hybrids tend to not be as good in the second generation. They are an F1 cross of a strain of Caucasian and a strain of Carniolan.
If midnight is such a hybrid it quite impossible to get same level daughters. Daughter mate with 16 drones at the distance of 1-2 miles. But if queen is good it is worth to buy after 2 years usage.
When I raise queens I take only 1. generation what ever they are.
In Argentina they use crossing Caucasian and Italian.