Motor Controller ugrade for Raven One Turntable

Only slightly off subject, I changed a flimsy power cord for a lessloss DPFC cord on the Raveen one controller and was very suprised at the improvement. The last thing I expected an upgraded cord to help , is a turntable motor. As someone else has said, all it has to do is turn a platter at 33 and1/3 or 45RPM, just how hard is that?

Well obviously it's very hard.

I wonder if the TW motor controller fucntion is very dependant on the quality of the main power supply.

Jaspert, I don't think that should be so. One of the functions of the motor controller itself is to protect the tt motor from poor quality mains supply, including ideally AC voltage instability.

I would replace it with the VPI motor unit + SDS

Slowhand,
You asked a pretty clear question in your original post. I'm astonished by the responses you've received based on no direct experience with the products in question. If someone actually is interested in the question, they can actually experience the comparison for themselves......It's much more fun to shoot the breeze with absolutely no real knowledge or experience.
I actually sat in Highwater Sound's listening room with Jeff Catalano. No B.S. no salesmanship....".Jim just listen for yourself." And I did. We had a Raven One first using MY OWN original motor controller playing thru his system of tubes and high efficiency speakers he demos in the HiFi Shows. We listened to a couple of cuts of music i knew well.
The ONLY thing changed was the AC motor controller was substituted for my own. The effects were clearly audible. The enitre sound field grew larger and the leading edges of the notes wer better articulated. This improved the rhythm and timing.
I then took Jeff's AC controller home to my own system and experienced the EXACT SAME changes I appreciated in his listening room.
So there it is. A well constructed comparison duplicated in two highly resolving but different systems.
Hopefully this will diminish the "forum noise" on this topic.
I'm not going to editorialize as to whether thee were monumental of minor changes. That's all personal opinion. I've tried to objectively report my findings.
All the best,
Jim