From right to left in line up:
Anodized Aluminum from the factory, 1.27 ounces
IPE wood, drilled and tapped Aluminum alloy insert, both glues are Silicon sealant 0.74 ounces
IPE wood, drilled and tapped steel 7/16-20 threaded rod insert, both glues are Silicon sealant 0.88 ounces
Maple wood, drilled and tapped stainless steel 7/16-20 threaded rod insert, both glues are Silicon sealant 0.85 ounces
Ebony wood, drilled and tapped stainless steel 7/16-20 threaded rod insert, both glues are Silicon sealant 1.2 ounces
The picture of the block [tomorrow's knob] is
Oak wood, drilled and tapped stainless steel 7/16-20 threaded rod insert, the one glue so far [no coin yet] is Devcon liquid steel two part epoxy