i just wanted to make the neck have no relief (Straight neck) i tighten the trussrod many many time, it doesn't move. and when i tighten it, is kindda not resist my hand, i have to turn it 5 times in a roll to make it a littlebit resist my hand, then when i go up for another round it loosen again, so is like this. **notice** i turn 5 times in one round because the rod is not resisting, i guess is ok to turn it five time in a roll. first quarter > Loosen second quarter > Loosen third quarter > littlebit resist forth quarter > littlebit resist fifth quarter > Loosen then wait and play it for about 10 min. and check if is move....notting, but i also heard about a Modulus neck system that only and loosen it. or maybe is that? thanks for reading all of this, bless to all TB nice user.