Best Alignment Protractor?

I like the latest edition WallylTractor (the full disk). Pivot to spindle must be set with their slick gauge. The mirror on the WallyTractor is a must, otherwise you are guessing on Zenith alignment at the null points. The disk has many arcs for different effective lengths, each with Lofgren or Baerwald for both new and older records. Their online calculator is easy to determine the correct arc. I have set up many tables with it… easy and precise, and one stop shopping.

Mint Best Tractor for me.  Perfect and the most accurate on the market

Original Dennison for me unless I am setting up an SME where I use theirs.

I’ve also used both versions of the Feickert which are fine, I just prefer simplicity.

I use a modified Mobil Fidelity Sound Lab's Disc.  I added an overhead pin to center on the spindle, dead center.  I may adjust the cartridge, by moving it ever so slightly forward or back to suite me.