"TML-M" and "TML-S" in dead wax--what's the difference?

Funny . . . the spacing of lead-ins and lead-outs on TML-X lacquers (at least up to 1981-82) were the same as Scullys (32.3125 or 14.729167... lpi lead-in and 3.92 lpi lead-out), so that would probably mean that Neumann's "X" cuttings at the time had the positionings "guided" by the "M" Scully, no? (I did see a setup at Capitol's Hollywood studios from the late 1940's or so where two Scullys had a string tied to each of their cutting mechanisms so that how one moved was guided by the other - was that kind of setup what TML used?)

 

I've always wondered if all three were ever slaved together, and how. I've certainly seen the same discs with -M and -S lacquers. Sometimes -M on one side and -S on the other. I'd have to search for any other combinations...