no m8 both clocks have to go back to check the one not used or with rubbish times has not been tamperd with not taking both leaves it open to cheats when i used a clock the guys on open doors had the advantage then it was the guys with sputnics where you could catch the bird without going into the loft then it was stall traps where you just pulled the rubber off so if i wanted to give my birds every advantage to win i had to get the same as them when i could make it or aford to buy it if i could do neither that was my problem or my choice