I can tell you one thing, the Feikert tool is a beautiful looking tool as well as beautiful to implement. I borrowed it from a fellow member and getting it, I adjusted my spindle to pivot, then set it up...
What this set up told me was that, based on my VPI TNT table and JMW 10 tonearm, the VPI JIG was the exact set up via the Feikert tool using the Lofgren method.
Anyways, I also used Wayner's tool, which is good, but there are limitations to paper CATs...though Wayner's tool works well!
Tuan