So Monte have you created any you consider melanistic yet? I had one weird gecko hatched out last year with a strange dark tint all over. It still has a bit of that dark tint but it also has hypo genes so it has lots of spots, just really little ones. So its this weird dullish greenish orange color mainly now, doesn't look like any special morph really just kind of odd. I posted a photoessay of her color development above.
She's het albino and gravid, it will be interesting to see if the albinos she produces look any different than the others.
Good luck with your melanistic project, good melanistics seem almost as hard to come by as nice snows.