Phantom Supreme to 4Point-14?

@wrm57 now I understand, have not had the pleasure of using a SP10R so not aware of the best tonearms to use with it. But based on your description then the 4Point 14 does seem to meet your criteria. Since the Safir uses the same template as the 4POINT9 then even that isn't an option. As you correctly stated either the 4POINT9 or Safir, while you can adjust VTA it's no where as easy or repeatable as either of the other 2 kuzma arms. Myself this isn't as critical although many yrs ago I too would adjust VTA based on the vinyl thickness. 

Sorry still can't tell you the differences between the 2 arms from your original post.

FWIW, so far as I know, the SP10 mk3 and the SP10R have identical relationships between the platter location and that of the surrounding rectangular escutcheon, and I had no problem mounting a 10.5 inch Reed tonearm on my mk3. So I don’t know why you think the 11 inch Kuzma would not work.

Lewm, I'm not sure which Reed you have but the 10.5's I've looked at have mounting distances of around 231mm or 251mm. Both would be fine for the R. The 11" 4Point mounts at 212mm, however, which scoots it up next to the motor housing, maybe too close, and forces the pivot it to be at 3:00 or so to the spindle, maybe lower. This would put the cartridge, at the end of that long arm, a little beyond the front of the plinth when in the armrest. The salient point here is that although the 4Point is 11 inches long, it mounts like a rather short 9-inch arm, which is a challenge for the SP motor housing.

Thanks, I hadn’t been aware of that oddity about the 11" Kuzma. I guess I should have been alerted to it because you did mention the mounting distance in an earlier post. But if the distance from the pivot to the spindle (aka "mounting distance") is only 212mm, how does it end up being 11" in effective length? I will have to look at some photos.

OK, I did find photos.  When you quote mounting distance, are you referring to the necessary room needed to clear the very large diameter VTA tower, which is larger than those used by Triplanar or Reed?  So in your parlance, the mounting distance is not equal to the pivot to spindle distance, in that case.

For the 4P-11 and 4P-14, the P2S measurement is very different from the mounting distance because the pivot is located on an outrigger platform. Mounting distance is where you drill out the armboard and mount the arm base. This outriggered pivot is what enables an 11 inch arm to fit where a 9 would usually go, which is an ingenious boon to most turntables but not our our SPs because of that big square escutcheon. The 4P-9 and Safir, however, mount at the pivot like many arms.