A set of Iso-Puck minis would be perfect. Each puck supports 2.75Kg.
I use the bigger Iso-Pucks under my floor standing speakers and the improvement...
Today a Silver Plate Mazda 12AX7A got delivered, as my old Mazda 12AX7S “went cloudy”.
This one has the following codes - VI-2, 6210, AXA, so French...