sustain block

Hey all, I posted a thread a little while back with a project/ngd where I installed a graph tech LB63 in an Ibby 350. I asked about this in that thread but I think it flew under the radqr cause I posted it as an ngd thread. I can't find information on the net at large about this, but I may...

How many have actually done this? Does it effect the tonal character enough to warrant a change? How would one go about this in the first place? I played a Charvel once that I know had a brass bridge ( a vintage strat style bridge, not an OFR) and i think the tone of the beast was partly a...