I'm pretty sure you get a BEL by crossing any of the two that carry the gene: mojo/lesser lesser/butter butter/mojo. I'm sure there are others too, I'm just not really good with genetics yet :p
Yep - and you can do all with each other, but the super mojave has a grey head. And you can also mix in Russos. So - Russos, butter, lesser, and mojave.