Not many mature bucks testicles would fit through a band

My vet did a yearling buck for me, no ansethetic, clamped his scrotum above his testicles, cut two incisions into his scrotum, pulled out his testees, scrapped the cords, sprayed them with furall/furox, then cut off the sacks. She released the clamped cords and sparyed the opening with furall/furox. He was up to date on his tetanus and never missed a beat. There are zip tie bands you can use on large calves, that may work on a mature buck, to me it would be cruel with all his equipment mature, big difference in castrating young bucks....young.
It would take a good month for his testosterone to diminish enough for him to stop stinking, wanting to perfume himself etc. But his demeanor, unless you are talking about normal rut, wouldn't change. Mean bucks are mean bucks.
And what a waste, let him live out his life as a buck or sell him for meat to ethnic groups who want intact males. Starting your farm with animals that won't be anything other than eating machines? Not a good start. Vicki