Just in case anyone is interested, there's an auction currently on Ebay for an Infinity turntable from 1973 which has an air-bearing arm. Looks like this prototype never got off the ground but it looks interesting (in a retro kind of way). My other 2 cents... the ET2 arm was quite wonderful but the armtube had to be meticulously cleaned and setup for the arm looked daunting.
Why Linear Tracking never took off?
Popular in the mid-80s...Linear tracking tables have vanished from the scene...what was the rational behind their creation?...Are there any good used tables to consider...or is this design long gone?....thanks...the simplicity of operation intrigues me...