Acoustic Sounds からの DM で面白いものがありました。
私の場合は VPI SuperScoutmaster with Signature tonearm や VPI SuperScoutmaster with Signature tonearm に付属している 治具で他の Tonearm も調整してしまうのですが・・・
This is it: Dr. Feickert's next generation protractor! We at Acoustic Sounds welcome this improved version of a very effective tool. The parameters are now carried out to utilize not only Lofgren and Baerwald equations but also Stevenson. This provides even further choices to reduce the distortion that can be caused by a less-than-ideal tangential position of your cartridge while tracking the grooves of your records. This is the best solution for accurately aligning your cartridge with a wider variety of tonearms. It is accurate, compact, more versatile and even easier to use.
"Enthusiasts with even moderately priced analog setups will find this protractor to be indispensable...No more guessing over crude paper or plastic overhang markers or mirrored devices; this thing works like a charm." - The Absolute Sound's 9 "Must-Have" Analog Accessories - Wayne Garcia, The Absolute Sound, June/July 2007
"Okay, let's get this said early; I consider this a must-own tool for anyone who cares about proper tonearm setup and cartridge geometry. This beautifully manufactured precision device, the work of Dr. Chris Feickert, incorporates both Baerwald and Lofgren geometries, the two principle approaches to cartridge alignment – one on each side. It's also a universal device, handling arms of 200 to 440mm effective length! It's easy to use and as far as I'm concerned, simply the best. It is an essential tool for your vinyl toolbox and with proper care, will last a lifetime. Highly recommended." – Richard S. Foster, Hi-Fi+, Issue 48