Re: Screw Force vs. Performance
I wouldn't be too concerned about the torque used for tightening those screws. Just make sure that they are reasonably hand tight or tightened with an electric screwdriver on a low-to-medium setting. There is no advantage whatever by over-tightening and you could strip the screw heads which looks ugly and may then shed small metal particles which could work their way into the magnet.
So, just use common sense. It's rather like changing the wheel on your car: hand tight is much better than machine tight .... especially if you break down at night on an unlit road and just can't budge the machine tight wheel nuts!
Alan A. Shaw
Harbeth Audio UK