Has anyone heard from Yip?

I forgot the third tool, the Ortofon Tracking Force Gauge.

@wrm57 

Unless you brutalize the tool, tolerances remain german tight. I think once you settle on an alignment, I use Lofgren B DIN, you never change the tool. As long as you are careful not to scratch the surface there is no reason the tool should not last forever. Always return it to it's box. 

The two tools I use the most are the SmarTractor and the WallySkater

Good thing you posted this. I have used any number of protractors over the years and the SmarTractor is second to none. It is so much more flexible and accurate. It is wonderful to use even if you are an old guy with bad eyesight. Yes, it is twice as expensive. It is worth 4 times as much. I promise you will never regret spending the money on the SmarTractor.