To experiment on my Milk Chocolate Moscow, I acquired a stable strain of AFR from a local hobbyist last November. This is supposedly a stable Taiwanese strain with good solid red and big dorsal. I have done F1 inbreed with no sign of deterioration.
Next, I have also crossed the pure AFR strain into my Milk Chocolate strain. As per best practices, the following are the combinations:
A: AFR (Taiwan line)
M: Milk Chocolate
1) A(male) x M (female)
2) M(male) x A (male)
while continuing the pure lines:
3) A (male) x A (female)
4) M (male) x M (female)
1) and 2) is expected to produce greyed-eye progeny as is usual for out-crossing of two unrelated albino strains.