Great Experience with Feickert Protractor

cleeds, Perhaps I misunderstand what you are trying to say in response to dang, but he is talking about turntables, not tonearms.  In fact, there are at least 3 different "standards" for spindle diameter.  As you might guess, it is critical for any protractor to fit snugly, with no "play", over the spindle.  Conversely, the spindle diameter cannot exceed that of the hole in the protractor, else the protractor cannot be used.  So, his question was not inappropriate to a discussion of protractors.  In addition to owning an older Feickert, I also own a UNItractor.  UNI was cleverly designed with interchangeable spindle holes; three are supplied.  The one that fits my Lenco spindle perfectly does not fit my Japanese DDs and vice-versa.  As to the Feickert, I can only say to Dang that I have used it with the Lenco and with at least one of the DD turntables I own; can't recall which.  It seems to "fit" both but not so perfectly as does the UNI with a precisely chosen spindle adapter.

Also, although both the Feickert and the UNI are loosely based on the Dennesen, both are a bit better in that both allow for checking the alignment by supplying a second pattern, displaced toward the spindle, where the stylus tip and cantilever alignment is confirmed.  (Maybe not a good verbal description, but if you own a Feickert you know what I mean.)

Dear @dangcaonguyen : ""  As my understanding, if two tables have the same spindle size one can use the same Mint tractor for the same tonearm. ""

your statement is correct IF the tonearm is mounted with the same pivot to spindle distance in both TT.
In theory foe tonearm geometry alignment the main subject is to make the tonearm/cartridge/TT set up with all parameters involved with zero tolerances. This is almost imposible to achieve, so what we can do is tomantain at minum those parameters set up with minimum tolerance to stay nearer " perfection " and that distortions be mainteined at minimum.

Regrads and enjoy the MUSIC NOT DISTORTIONS,
R:

@lewm 
Yes, I understand what you are saying about the spindle hole on the Dr. Feickert completely. Before I bought the Smartractor, little brother of the Uni tractor, I had to cover the spindle of my Garrard 301 with a piece of thin film food wrap to make it snug for acurate alignment.
@rauliruegas 
Yes Raul, that is what I meant. Thank you for confirming it.

Hi- I live out in Wheaton and I would love to able to try out the Feickert Protractor.  I have a Lenco PTP-4 TT and a Fidelity Research arm that I need to mount.  Please let me know how we can move forward with this.

Dear cetla, Whom are you addressing? Has someone offered to lend out  a Feickert protractor for home trial?  If you live in Wheaton, MD, you are welcome to come and take a look at mine, but I would rather not lend it out.  I could show you how it works on my own turntable.  I own the older version; I don't know exactly how it differs from the latest version, but not by much. I am guessing, however, that you live in Wheaton, IL.  

The first thing you need to do is to locate the exact spot on your arm mounting board where you wish to mount the FR tonearm.  For that, you don't necessarily need a protractor, but the Feickert can in fact be used for the purpose of locating the hole to be drilled.

A shout out to Raul. I hope you and your loved ones survived the earthquake without any injury or loss of property.  Please let us know.