Hi Jose, I did some adjustments on the ball carrier angle, on the lever stopper, on the counter weight and was able to reduce the speed, also on the tightness of the rubber ( supposed to use spring ), Yes, it needs right combination of those factors, needs to fine adjust..
Bernardo, também construi um equipamento de liberação de bolinhas mas é difícil calibrar a liberação bem lenta, assim como a sua está muito acelerada. Difícil fazer treino nessa velocidade. Tenta fazer bem lenta e posta.
I would like to build one, since it's more silence than a ball machine so less objection from other players nearby. Here is some already building and selling one. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-rFbg9ems3SE.html