How tight should the screws/bolts be?
A common problem I see when checking out a setup is overtightened bolts. The most common of these is the one that goes through the bottom of the main shaft. This causes the auto hub sleeve to warp and then it will not turn free as well as cause the auto hub to occasionally lock up. The top bolt through the main shaft is also commonly too tight. Most are thinking to themself they sure do not want the head to come off so they really get this bolt tight. The ironic thing is that they are actually increasing the chance the head does come off. The reason is the shaft of the bolt has tension from being stretched and in addition there is the normal side force from the main shaft. This together will eventually snap the bolt. So what is the right torque? For any bolt or screw as you are installing it you will feel a constant tension followed by a sudden increase in tension as it reaches the end. At this point you turn it 1/4 turn more and that is enough.
