Feickert Protractor - anyone use one?

mohawk, I've used a Dennesen for years.  It predates the Feickert and works on the same principles but is not as versatile.  It has been out of production for years and was offered in both metal (which I have) and plastic versions (lower cost).  It does have a "divot" to precisely locate the stylus tip.  Used examples do appear from time to time.

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While I've never used a Feickert I expect it has the same limitation as my Dennesen.  They really only work with arms which provide some means of identifying the precise pivot point for the arm.  That can be a bearing set screw, damping fluid well, etc.  If you are simply trying to estimate location of the pivot point, whether by eye or by measuring, I don't believe you can have the necessary accuracy for something as precise as the stylus alignment. 

Feickert is great, worth the price (especially used), i use it with all my tonearms and i don't need any other protractors. I like the build quality. design and accurasy and if you can find any better it must be very expensive. The cheaper protractors are not as good and the design of the cheaper protractors are funny. Feickert is the real thing! 

Yes, but ANY alignment tool is worthless if you have not accurately set the P2S distance in the first place. This (difficulty in locating the pivot point) is not a flaw of the Feickert; it is a flaw built into the tonearm by a designer who neglected to account for it.  I actually believe that the Feickert (I have the older original version that uses a white plastic platform shaped like a full size LP, not the newer one that uses a black platform which is about half of a circle in shape) is better than most protractors for helping to precisely set P2S, so long as the pivot can be located with accuracy.  I also own a UNItractor, which is yet another much more elaborate take on the original Dennesen.  For its high cost, the basic original UNI does not incorporate a measure for P2S.  I was offered such a device as an accessory, for a mere $395 additional.  (In fairness, this issue may have been fixed in later versions of the base UNI.) Anyway, I use the Feickert to set P2S, and then depending upon how anal I want to get, I may use the UNI from there forward.  I also have a metal Dennesen, which sits in a box.  

Good point Lew.

Actually I've utilized my Dennesen to precisely locate the spot to drill to mount an arm.  With the P2S dimension given by the arm manufacturer and a steel metric ruler I set that distance on the Dennesen.  Then placing the alignment plate on the spindle I can swing the device to identify the arc on which the arm should be located.  From that I chose a position on that arc which best accommodates the arm and mark that point to drill.

All this seems obvious if anyone owns a Dennesen or similar alignment tool, but those considering buying one may not realize this extra benefit of this type of alignment device.