There is another solution that I have used when faced with a flimsy floor which transmits footfalls to the turntable - hang the turntable from the ceiling with 4 guy wires attached through turnbuckles attached to a large shelf. The turnbuckles are used to level the table.
I placed the shelf-turntable assembly close to a wall where horizontal sway could be controlled through two small springs located horizontally between the edge of the shelf and the wall. Works great. My turntable is an Oracle Alex III. The effect is quite stunning, also, since one cannot see the guy wires, so the turntable appears to be 'suspended' (excuse the pun) in air.
Salut, Bob P.
I placed the shelf-turntable assembly close to a wall where horizontal sway could be controlled through two small springs located horizontally between the edge of the shelf and the wall. Works great. My turntable is an Oracle Alex III. The effect is quite stunning, also, since one cannot see the guy wires, so the turntable appears to be 'suspended' (excuse the pun) in air.
Salut, Bob P.