Spindle-To-Pivot Distance

Rauliruegas if you read through the posts carefully  you will see  both lewm  and myself  are questioning  the null point concept.   I  am not sure about  about  how important  the whole thing is.  You might want to listen to a RS tonearm and  see it breaks all of the status quo rules yet still sounds spectacular.  

Maybe  have a person  get a album you are not  familiar  with then have him play it  choosing different  spots , with you not looking.  Then  tell him where the  null points are on it .  Then you will know first hand  if you can  or if it matters.  Another  test would be have your friend  change the offset on the cart then play album.  Have them change the offset around  including the right spots.  Write down you hearing findings then compare  notes with  his placements. 

When I did  the test the two arms where attached  to the same table and if you noticed  I  said I really did not do enough testing to give you a  any  real findings.  But I can say I  have not  heard any wild distortion  issues  with underhang and 1 null point.  

I realize  humanity  wants absolute  answers to all their questions  but music reproduction  has far to many variables  to  be able to do the the  math run the test equipment  and have great sounding gear.

So back to the OP  all the stuff was brought  up  give him some ideas different  than the status quo.  Weather they are better or worst  is up in the air.  You already know they move the null points around  so where are the perfect spots.  

Enjoy the ride
Tom

It's possible to use the arm with a slightly shorter spindle-to-pivot distance, but the standard geometry for the arm will not work.  A new geometry and alignment system has to be generated.  There is a geometry generator on vinylengine.com .  

Will that setup work as good as the one designed for the arm?  Maybe.  Will it be as easy to set up as the stock alignment?  Probably not (IMO, 95%+ probability of being more difficult).

@Lewm.  If you think it sounds OK with 10mm too much overhang that's fine with me.  Just don't bother us.

Guys, forget the null point issue. It is not the problem. Overhang is the problem. Getting the right overhang would require sliding the cartridge back in the head shell towards the bearing. There is no arm I know of that is that adjustable given the limits set by the turntable. Running a tonearm with an overhang 0.5 cm over spec increases the skating force. The force vector will shift clockwise as the tonearm travels towards the spindle and eventually the stylus will pop right out of the groove and arm will zing right across the record with obvious results. 

You will either have to manufacture a special tonearm board as jasonbourne52 recommends or get a 9 inch arm that will fit. Long arms are not a panacea. They do lower tracking error but at  significant expense. Many of us, myself included think it is a raw deal. 

Dear @lewm : ""  I have to wonder what Baerwald and Lofgren heard with what must have been...""

that does not changes in any way the orthodox alignments.

In the other side I know you are not deaf and as you I owned the RS tonearm that I bought by some kind of " curiosity " but never was for me something other than " interesting " and was sold.

As you and I posted at least twice in otjher threads I made once a mistake with the overhang set up, I made it longer and was unawarte of that mistake.
I did it with a very well know ( for me ) cartridge quaklity performance and I was listened to it by 5-6days and I took in account that for " whatever " unknow reason the high frequency range performs better than ever with more definition and " transparency " but at the same time something was not good enough at the other frequency extreme where lives the music foundation and I was very sensible to that range as with the other one.
My common sense told me that something weird could be happening down there and I recheck the tonearm cartridge alignment at found out my error.
After fix it " things " settle down but I tested on purpose with other cartridges and results were similar.
Can I live with? of course I can it sounds really good but that bass range performs better under the rules.

R.