I'm sorry that i didn't comment on this thread at an earlier date but I just now found it.
One thing that was not mentioned in any of the comments about the ET 2 arm is that the counterweight is decoupled via a leaf spring so its effective mass is lessened in the horizontal plane. This would lessen any of the destructive forces placed upon the stylus cantilever. I do not know of any other linear tracking arm that has this feature.
How this works is nicely explained in the ET 2 instruction manual. I hope those of you who have owned this arm took the time to thoroughly read this well written and informative book.
One thing that was not mentioned in any of the comments about the ET 2 arm is that the counterweight is decoupled via a leaf spring so its effective mass is lessened in the horizontal plane. This would lessen any of the destructive forces placed upon the stylus cantilever. I do not know of any other linear tracking arm that has this feature.
How this works is nicely explained in the ET 2 instruction manual. I hope those of you who have owned this arm took the time to thoroughly read this well written and informative book.