RIR or one of your sex-links! My RSL's comb didn't seem to be as big as others when she started laying but she did! Your's has those thigh poofs of feathers, so she still could lay first!
my RSL was the first to lay, followed surprisingly by my cuckoo maran- I thought my BA would beat her for sure- her wattles are HUGE! But she still is not laying, who woulda thought?