I tried it about 20 years ago got them to their second last flight wasted my young bird season The DVD i followed was Sampson bros of USA ,they were never on 24 hrs light And you had to pull half the tail feathers And when they were half way up pull the other half .i felt that at the Time i couldnt give them a 100% as i worked long hours ,but in saying that i think if you master The system you will be hard to beat.i have Plenty of time now ,but im afraid my get up And go Has got up an went .good luck hope it works for you.