Hi Peter.
I liked those legs: Anti-Vibration Levelling Foot - Medium Duty (WDS 693) --> M16, 1200kg max load
Anti-Vibration Levelling Foot - Medium Duty (WDS 693), Anti-Vibration Feet | WDS

filler for EG: quartz sand- 30% 0.16mm, 30% 0.63mm, 30% 2mm (Al2O3 is expensive for me)
Epoxy: 10% biresin CR83 (if I succeed with that small percentage).
Will glass fibers help here or not ?

For vibration - I have ENAR AVMU 2.3kW/3HP with vibrating eccentric head 48mm, 4m shaft (frequency V.P.M. 11500)

About Carbon Fibre blocks - for what?. What do you mean?