True, to get the entire correct pattern in the F2 would require hatching large numbers of chicks, any way you do it.
I was suggesting that they select F2s for lavender and mottled (1 in 16). Then they would have have less genes in play as they work among those birds to fix e+ and barring.
And I thought they were citing ratios of getting barred, mottled, lavender while ignoring e+/E (1 in 32 chance, not 1 in 500 that they said the chicken calculator was giving.)
I wonder if getting a different breed is an option?
If the ultimate goal is a 55 Flowery type bird, using a Spangled Old English Game Bantam (mottling on wild type) instead of the Houdan would keep all birds pure for e+, and would also avoid the Houdan's crest, v comb, and extra toes. Of course it would introduce a smaller size and poor laying ability, so it might just be trading one problem for another, and not really be any easier.