New block, a further discussion

[aonemarine]

why does the block have to be cast in iron or aluminum? Why not cast it in bronze?
why does it have to be sand cast? why not investment block cast it?
why in the hello do i think of this crazy stuff?

125lbs of silicone bronze = $625.00, 500 lbs investment = $675.00 expensive yes but easily repairable, more ductile than grey iron, less likely to have casting problems if done under vacuum.....Not good for high production due to material costs.......
Hmm could some crazy redneck in his back yard pull it off?? I wouldnt bet against it