Just to clarify: the Wally Tools "Wally Skater" is one of a number of alignment and measurement devices designed and sold by
Wally Malewicz for setting up and aligning tonearms and cartridges.
More details at:
http://www.simplyblack.net/WVC/index_wally.html
More details at:
http://www.simplyblack.net/WVC/index_wally.html