use the prongs to push into the lamb and the balls often pop into the sack,
I put the band halfway down the prongs, open up and put over, lamb is dangling between my legs, sort of upside down and sort of hanging with legs split and balls on show, head clamped through my legs rest dangling
Take the end of the balls using just a tuft of hair, not squeezing them, guide gently through and then I push the prongs into the actual lamb, not hard but firm and then release, as the prongs were underneath the balls then the balls cant go back in, I check that all is well and he has two in the sack and then wiggle the prongs off whilst rolling the band down, I do the tail at the same time, then grasp a back leg and swing the lamb forward and onto its legs at the same time and grab the next one by the same hind leg and swing up inbewteen your legs, grip with your legs and keep going, means you have two hands to do the job and never have to hold or adjust the lamb with your hands
I can do easily 60-100 an hour like this working on the 1,500 ewe unit
If the lamb has only one ball or they arent there then I always leave the tail long so its easy to tell from a distance