TW-Acustic Raven AC3 latest version vs older

There are allot of owners of this table and AC along with others whom I'm sure can chime in with information and findings.

My understanding is the latest version of this table has gone threw some changes over the years and at least one of these can't be applied if you have an older table. (bearing)

-CONTROLLER UNIT, latest had TW engraved in the face plate. I have read that some prefer the older version, care to elaborate further.
Also some are using the Black Knights, care to elaborate on the sonic differences.

-ARM BOARD

-ISOLATION FEET, anyone notice what effects these offer
also some have gone with the same ones used on the Black Knight

-MOTORS, I have three. I noticed viewing some other owners that the construction they seem to have less stainless steel base, anyone notice any diffferences sonically, if so what.

Some are using the Black Knights motor, what have you noticed to be the difference sonically

-BEARING, this is much more involved so not just an easy switch or ad on, my understanding you need a new platter etc. much more involved. The bearing is a different size and has isolation of some sort, tighter toilerances which in the end offers less noise.
If anyone has pictures or can elaborate better would be great and to see.
You can pm me personally if this is your preference.