On the topic of filling the extruded section with resin, reinforced or otherwise, has anyone got views or experience of lining extrusions with carbon fibre?

Obviously this could not apply to the sections above but I am thinking of say RH Al or Fe 120x60x3, 100x50x3 being used for the Y gantry.

I understand the logic of adding weight to kill vibration but this weight has to be accelerated and decelerated.

With a layer or two of carbon/kevlar fibre cloth and resin applied to the internal surface of the RH and cured, could this provide an element of vibration reduction whilst reducing the tendency of the Y gantry to deflect under the torsional load caused by heavy cutting in X?

Just a thought!!