i have found with the l.g if you keep it to around 25-30 eggs or less i do great i think itis rated for 42 chicken eggs but when it is hatch time 72 eggs will have no where to hatch or walk they need room between them to push of the egg shell good luck we have had some good hatches with our lg but never did that many most we ever try is 36 an that was crowded we hatch orps so they are good size eggs.