Just curious, Why in the hell would anyone wanna do that, when the stock arm with upgraded wires and cables is killer. Don't buy into the BS about those arms. As it's plain and simple, just BS.
I like the way you think.

But, just to answer the question. I have a Technics SL-M3 as well as the 1200's. I love this deck, motor specs, according to documention are equal to or better than that of a 1200. It's eye candy and the linear tracking arm does have audible improvements over a pivoted arm. For instance, I noted on more than one occasion that the inner grooves sounded "clearer" or better yet, there was a sameness of "sound" from the beginning to the end of the record. Keep in mind I do have an upgraded Technics tonearm and I am also using a KAB fluid damper, which is fantastic, and I also eliminated the tonearm PCB.
Linear trackers are all about eliminating "the arc of error" which all fixed pivoted arms have, with maybe the exception of the tonearm on the Garrard Zero 100, which was designed to reduce the same. Technics linear tracking tonearms still pivot, though, which means it is still pulled out of absolute linearity as it travels across the record, even if not very much. Also, the arm mechanisms are electromechanical and it is possible to see and measure the audibility of the motor engaging to move the tonearm. For everyday listening... the noise is so low it is a non-issue. However, for the archivist/transcriptionist, this is not a best case scenario especially considering the excellent performance of a pivoted arm with no motor noise.
So... I thought to myself... self... what if you were to put an air bearing linear tracking arm on the SL-1200MK2!?! Besides the satisfaction of pissing off those snippy audiophiles who measure the quality of a system by dollars spent, there would be the benefit of an impossibly accurate and dependable drive system with the inclusion of the benefits one gains from a silent air bearing tonearm. Take for instance the Eminent Technology arm (and the like). They are linear trackers without a lateral pivot point. There is no motor. With the forced air, the slightest pull of a record groove is enough to move the arm. Check out some youtube vids. Pretty awesome. All one would need is a different armboard and there are plenty of those around, or they can be made.
I decided against going with an Origin Live or an SME M2-9; however, I don't think they suck. With the OL, I would have just lost too much convenience. The SME M2-9 is expensive. If I was going to spend that much, I'd just spend a bit more for the SME 309. And if I'm going that crazy with it... the linear tracker started to make more sense. And, to be honest, when I got there, it was like... "...do you know how many albums you could buy with that kind of money..." LOL!! So, I was just wonder if any one had just gone on and did it.
We're all insane; it's just a matter of how insane. 