Hi Lewm, I don't have near the long term expearience of moost of the AC1-AC3 owners here on Gon, I first tried the Raven One and then moved right to the AC3 and that experience was huge difference in my set-up. A friend and member Glai has a AC1 and asked me to do some comparisons for him so I did.
In my set-up I only tried configurations one vs three, I really don't care about physics, theory etc. just the end result and to my ears I prefered the three motor. Don't know what's going on and really don't care but it was a pretty easy exercise.
F.Y.I. I actually just sold my AC3 which is a great table and I could have lived with it for a very long time, I truely enjoyed it's short term stay but if you refer back to my past threads you will read from the get go I was looking at actually getting the BK from the get go but decided to take my time and get my feet wet which I have and now have a BK on it's way. To be honest if I knew what I know now I would not have bought the Raven One because the info. I read was not accurate sugesting it sounds very close or similar to the Raven AC, sorry don't want t ostep on any toes but in my set-up there is no comparison so if I would have known that then I would have bi-passed it saving my self some time and money loss.
Looking forward to getting the BK, I'm also ordering the TW 10.5 arm which I'll pair up with my XV-1s cart latest version along with installing my REED 12" arm with MSL cart, well actually my good friend Rickmak will do the initial set-up and then I do minor adjustments dialing it in.