12 inch Graham Phantom

I remember reading somewhere that mistakes in setting up a 12 inch arm as compared to a 9 inch arm will be more "severe". I forget where I read it but it seems to make sense. A 12 inch arm is less tolerant of poor setup than a 9 inch. Also I find the the Lofgren A vs B vs. Stevenson alignments cater to different arms differently.

Dgad, ...
10-03-10: Dgad
I remember reading somewhere that mistakes in setting up a 12 inch arm as compared to a 9 inch arm will be more "severe". I forget where I read it but it seems to make sense. A 12 inch arm is less tolerant of poor setup than a 9 inch.

.... interesting.
You will supply the geometrical background for this statement ?! At least for this poor educated soul of mine it is not immediately apparent, why "mistakes in setting up a 12" arm as compared to a 9" arm will be more "severe"...".
This rather seems one of those "high-end-audio-only laws of physics" probably stated by one of the self-promoted deans of analog-audio-MIT
Please clarify.

Derto/Dgad: on increased potential for set-up error for longer arms, I remember seeing that too - in one of the mags, maybe Dudley in the last 3-4 mos, maybe when he did the Schick (sic) arm. Or it may have been one of Fremers asides...but I have in my head, Dudley.

Well, the Set Up with a long one can be a real task, but it is worth the time

done right

Dear Asa, thanks for the further hint, but my problem is with the statement itself - not so much its "origin". It lacks even the most basic traces of logic and geometry. It is o.k. with me if an audio reviewer has problems in aligning a pivot tonearm (I guess most of them have...), but it is something else if one tries to hide one's inabilities and lack of expertise behind "technical explanations" which have nothing to do with the real world and are (at least for some) an insult to basic school knowledge.
It reminds me of that indestructible "zombie statement" in tube audio that 12V and higher heaters are somewhat sonic inferior to 6.3V heaters.
Seems that in high-end audio no statement is silly enough, that it don't become "proven statement" if it is only published somewhere online.