[quote name='HowieBass' timestamp='1429203118' post='2749223']
My thinking on this is that you want to keep as much of the string vibration stuck inside the strings for as long as possible if sustain is important to you - transmission of energy beyond the fixed ends of a vibrating string, at the nut into the headstock, and at the bridge saddles into the body are, from a physics point of view, just dumping energy into heatsinks. Effectively both nut and bridge should act as mirrors. Bridge rigidity is more important in this context than sheer mass. I also believe that neck rigidity has a big part to play in sustain. Again, all in my humble opinion.
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I'm with you on that and that is pretty much Alembic's take on the subject of sustain hence the huge sustain block and machined brass bridge and nut.