Router design thoughts

[Tenson]

Has anyone used constrained layers to help dampen vibration and resonance in a machine? I'm thinking for the gantry you could use the normal 16mm slabs of alu but also affix an additional 6mm sheet with green-glue. The thinner the layer of green-glue the more friction it generates so the more effective at damping.

[Rogue]

Greenglue is interesting stuff but have you seen the cost involved?!? You have to buy it by the case for a start.