New Schroeder linear tonearm, any thoughts?

The first video is fascinating. The second one does not really give a sense of what is happening.

I would think that for it to have truly linear (tangental) movement, the stylus must follow a straight line moving along the exact radius of the LP, theoretically ending at the spindle or center. It looks like this is accomplished by the base moving in and out and being hinged at two points and moving along an arch. But I don't see that the base moves the entire 5" or so that represent all of the grooves on the LP.

It's a very intriguing design and a difficult geometry problem to visualize. The bearings must be extremely silent and free of slop for there not to be any chatter considering all of the movement at the base where it can vibrate. Could Arnie or jfrech add some clarification?

Hiho, Thanks for the explanation. It is much clearer now. As long as that angle is 90 degrees, the stylus does not need to trace the radius of the LP. It is constantly hitting a different radius as the LP rotates which is why it is always tangent while a normal pivoting arm only hits two radii, (at the null points) during the entire side. That is why the arm base does not have to move that 5" or so. This arm is constantly adjusting.