Hi Garybx, I've just bought the Salvation w. Terminator linear tracking arm. It's a match made in Heaven. I've just opened a thread 'Trans Fi Audio direct rim drive turntable' which I hope can answer your qs. The only downsides are that setup is pretty critical. It really benefits from being absolutely level, and the arm, being air bearing is v. fussy wrt unencumbered air supply via the hose from the pump.
Other than that it's all positives. It totally trounces my belt drive of 12 years (Michell Orbe/SME V), with extended articulate bass, clarity of sound due to minimal time smear, clear mids and really ethereal treble.