I honestly hand on heart don't know mate.
i had about 300-330 rests but i also trained a few of my other players.
like i said wish i payed more attention to what i used on him for future training of these youth players.
but i would deffo do it again if the right player came along.
best thing is he is still training at a decent rate of knots has slowed down a tad but still going strong.
This was his last training session off 10G/K training when he was at 130% Quality.