A Copernican View of the Turntable System

Halcro -
The easy way for you to fix the issue is to get 3 holes cut and threaded for machine screws ( grub style ) around the outside of the centre bolt in the arm board as wide as possible ( maybe just inside the edge of the tower.
Get some machine grub screws and get your engineer to put a fine radius tip on each.
That way you can level the armboard with the 3 tiptoes and just use the centre bolt to lock it down. You could go to a nylon centre bolt to get a 3 point mechanical diode if you like.
You can also check if the vertical bearings are parallel to the platter and adjust if necessary for errors in the arm with this system.

That's a clever idea Dover.
Thanks :-)

Dear Halcrop: Not big deal. A design mistake in the Raven means only that but I think that's not the rule. I just checked ( because your post ) my two AS that use three arm boards each one cantilevered type atached at the down plate of the plinth: all six arm boards are leveled with the platter and plinth and the motor too.

The Lewm statement about in theory is absolute right, things are is that our ears can't perceive any " error/distortions " with our stand alone arm board/towers. Such is life.

Regards and enjoy the music,
R.

Dear Raul,
You're lucky...........But as Syntax says........intelligent design and precision should eliminate the need for 'luck' in our systems?....don't you think?
Regards
Henry

03-06-13: Peterayer
Syntax, I presume that digital level also reads 0.0, 0.0 while it rests on the platter.

click me softly

Like Halcro wisely wrote, we do not need luck, we need someone who does something right.....btw. did you ever check the Pulleys from the super-duper VPI TNT motor .... but I think, the unlevel Armboards from the Raven are the compensation for the unstable motor management.....it is a design feature