The gongs in the Master Grande Tradition Grande Comp are rather unusually square rather than round in cross-section the
link idea being to provide a bit more surface area for energy transfer from the head of the hammer. They are also soldered directly to the sapphire crystal
link in order to more efficiently transfer sound energy to a suitable resonating surface this is like the trebuchet hammer a JLC invention which goes all
link the way back to the 2007 Master Minute Repeater.