Dr. Feickert's tables exist in the real world, ergo they are as subject to footfalls,etc, as is anything else in the real world. I guess you have faith that they are well isolated from such external disturbances. That's fine; I wouldn't know about the Feickert table.
I was not inferring that the VPI Controller specifically is the best choice. However, I urge you to consider that a good controller is far far from a "secondary solution", especially with a belt-drive turntable. Adding a controller properly designed to supply the AC needs of your tt motor is a MAJOR upgrade, if you did not have one prior. It's tantamount to spending $10K on your tt when you actually spent $5K, altho the analogy is inadequate to describe the difference. One of the best of the "simple" controllers is the Walker Audio Precision Motor Controller. Most who have heard both say that the Walker is a bit better than the VPI. I refer to it as simple because it does not have the capability to split phase to supply a 3-phase AC synchronous motor optimally. However it will work with such motors. I used it on a Nottingham Analog Hyperspace (which also should be on your list, incidentally). It made a huge improvement in midrange and bass clarity, separating musical lines, etc. It also revealed the effect of AC phase on motor performance. (The Walker has a switch to reverse AC phase by 180 degrees.) I was shocked by the improvement.
I was not inferring that the VPI Controller specifically is the best choice. However, I urge you to consider that a good controller is far far from a "secondary solution", especially with a belt-drive turntable. Adding a controller properly designed to supply the AC needs of your tt motor is a MAJOR upgrade, if you did not have one prior. It's tantamount to spending $10K on your tt when you actually spent $5K, altho the analogy is inadequate to describe the difference. One of the best of the "simple" controllers is the Walker Audio Precision Motor Controller. Most who have heard both say that the Walker is a bit better than the VPI. I refer to it as simple because it does not have the capability to split phase to supply a 3-phase AC synchronous motor optimally. However it will work with such motors. I used it on a Nottingham Analog Hyperspace (which also should be on your list, incidentally). It made a huge improvement in midrange and bass clarity, separating musical lines, etc. It also revealed the effect of AC phase on motor performance. (The Walker has a switch to reverse AC phase by 180 degrees.) I was shocked by the improvement.