thanks for the info i have 8 piar of distance pigeons in there own section i will be pairing them march kind of time just for the ditance races 500 plus my young birds a year old this next year will be put on to round about after they have brong up a pair of youngsters from the stock loft i am going to put them on to round about after they have brung up a pair each just to see if there are any diferance with the round about system as my birds was not flying good enough last year when they were flying natural but hoping they fly better next year on the roundabout system i will fly the 2 year olds natural 8 pair just for the distance