lav and ivorys

I was just wondering if anyone has bred a 66% lav to a yellowbelly before or to an ivory?

I am sure it has been done, the genetics would be pretty simple on that so, there is no mystery about the outcome of the breeding...

66%lav x Ivory
All yellowbellies 33% possi het for lav

66%lav to yb
50% normals 33% possi het lav
50% yb 33% possi het lav

33% is not the best odds... lol