Best Alignment Protractor?

Parallel tracking arms also require alignment. Azimuth, VTA/SRA, overhang.

No overhang on a linear tracker.

My Eminent Technology "protractor" is clealy more accurate than for any pivoted arm I have seen - you align the stylus to a very fine scribed line. The ET protractor aligns to the bearing housing ensuring that the stylus is at precisely the correct position for accurate tangential tracking.

For pivoted arms I use the Dennesen ( metal ) - the Feickert is easy but the size of the dot on which you place the stylus is far too big compared to the Dennesen and not anywhere near as precise as the ET. In fact a traditional accurate cardboard protractor with a pin prick for the stylus to drop into is probably more accurate than most - I have the old Garrott Bros protractors and they are very very accurate.

@cleeds 

As I said I have an Eminent Technology set up jig ( protractor ) that locks to the turntable spindle and bearing housing on the arm. It has a scribed line to set the stylus tip to. It is very accurate.

http://www.eminent-tech.com/techsuppt.htm

page 23 of manual

I’m not suggesting the Feikert is the best. But it’s worked well for me.

I agree but for the Feickert and Dennesen to work you have to be able to accurately locate the exact centre of the horizontal tonearm bearing and this is often not possible. Some arms now have a locating dimple for that purpose.

If you can't find the centre of the horizontal pivot bearing the traditional 2 point protractor will be far more accurate.

I have both the Feickert and Dennison and I have gone back to 2 point protractor with a pin prick in the card to locate the stylus. It is more fiddly but more accurate than the F&D, assuming the 2 point protractor is correctly manufactured to spec.

The 2 point protractor I use has very fine lines compared to many others - this too is important for accuracy.