fliptop

I asked this on another forum, but after getting info from reading through this forum (which ROCKS!), want to ask it here:

What is the consensus? Are they intergrades or a separate subspeicies? From what I've read in books, they seem to be intergrades, but I believe I've also read that they are not.

I find them attractive and if they are intergrades, am considering crossing one with my WC albino yellow male. What do purity buffs think of that? note: I did acquire a couple WC normal yellows from the same area my male was collected from.

Thanks!