[quote]alternate wrote:
Say you’re complaining that you feel chin-ups too much in the biceps, not enough in the back.[/quote]
Have you tried the advice from any of the 20-something replies you got last time you asked this question, when you were feeling chin-ups in your biceps while using bodyweight + 120 pounds for 8 reps, about three months ago?
I’d start there. But because I’m a softy, I’ll add just one bit: The neutral-grip you’ve been using puts the arms in the strongest position and allows them to contribute most to the movement.