I'm one of those LP fanatics who's never quite sure of his cartridge set-up skills. Over the years I've used a number of alignment devices: various paper/plastic gauges supplied with tonearms, the dB Systems protractor, the MFSL Geodisk, and most recently the Feickert universal protractor--which is what I used with my Hadcock arm to set up a Music Maker III and my current Benz L2. But even with care and time spent on alignment I have not always been satisfied with the sound, and have had my doubts about accuracy. In my search for cartridge perfection I had considered the Wally Tractor, but his record with regard to customer service is abysmal, to be kind. Additional research led me to this product: http://www.mintlp.com/best.htm. I had a bit of hesitation over ordering from Hong Kong, but other customer comments were positive so I took the plunge. From ordering to arrival was a little less than 10 days--not bad--and everything arrived in fine shape. I spent a little over an hour with the tractor yesterday evening. Compared to what the Feickert had indicated my effective length was too long by about 1.5 mm. After correcting that I then aligned the stylus/cantilever. After I was certain that I had the proper alignment I cued up the 45-rpm version of Louis Armstrong's "I Ain't Got Nobody" re-issued by Classic. My wife, who rarely pays attention to my system other than the fact that it plays music, said unprompted, "What did you do to your system? It sounds a lot better."--and she was sitting in the room next to my listening room! Smoothness, openness, ease of the sound, naturalness, separation and depth were all improved. I owned an ET-2 tonearm for many years, so I am very familiar with the character of sound when tracking errors are effectively eliminated. I would say that the Best Tractor is the only alignment device that for me has brought the sound of a pivoted tonearm closest to that of a linear tracker, especially at the inner grooves. Downsides: Not cheap compared to a paper protractor, but it is expensive because it is accurate. It is useable only on arms with the same pivot-to-spindle mounting distance and with the same spindle diameter. The lines on the Tractor that you are using for reference are very thin and small and you need good magnification and a lot of patience. If you like to change arms or 'tables a lot you will need to get a new one every time you change. Upsides: A lot less worrying about whether or not set-up is correct. It makes your vinyl sound better! John K.