Progress is measured by the increase of your top end strength, not needlessly progressing from ridiculously light weight. He won't hit a wall before he makes any real progress, he'll just find his optimum 5 rep max faster.
I'd start 30kg for bench, 40kg for squats and 50kg for deadlifts. Make sure your technique is spot on though!
I'd start 30kg for bench, 40kg for squats and 50kg for deadlifts. Make sure your technique is spot on though!