Perhaps nobody on this forum yet has used a Mintlp Tractor on a Technics 1200-1210, but I have used my Mintlp spec'd at 211mm arc on my Denon DP-2550, with new Acrylic Armboard, and retrofitted my mint 11 year old AQ PT-8 Arm.
My machinist buddy Andy had to make-machine a "locating Pin, that could be installed into the AQ Arm Base (A custom Arm base was made on my HW-19) This locating Pin-Rod, which was machined to a sharp pencil point, was then installed into the Arm-Base at a level height to Spindle, which is highly critical, so an exacting, accurate measurement could be insured on the S-P distance of exactly 211mm +-.001"! Yes, Andy's that good.
Thus, my Mintlp Tractor, at 211mm woks for both my Denon, and VPI Tables. This I feel is the very most important parameter, insuring that indeed, you are giving Yip exact measurements for your S-P Spec. Just "trusting" what VPI, Technics, or any other manufacturer for that matter "claims" thier S-P distance is might not be enough. If, the Distance is possibly off my 1mm, or 2, then you are back to square one, and you might not be getting any better alignment than the cheapo plastic jig that some provide with thier Tables.
I had found on both Tables, that the Turntable Basics Mirror Protractor was at least off by +- .500mm-1mm. The sound improvements on my HW-19 prooved the Mintlp did do a better job, and the sound did improve.
As a crazy experiment, just for the hell of it, I pulled out a bought new Benz Ruby 3, from it's Box, and mounted on the Denon Table, set up with the Mintlp Tractor, and I was very impressed at the fine performance, and sonics this old Turntable was giving me. I can only think of one catchy phrase to describe the sound, and that is "PRAT".
Still, the question I persist in asking, will Baerwald null provide a suitable set-up, versus another null on these technics, and I would assume yip would not have any problems slightly skewing the null points to a slightly different measurement to accomodate some of these japan made arms.
Has anybody asked this of Yip? Or are we to assume that Baerwald will be the best for a Technics 1210? I know if I owned a Technics 1210, I might feel some comfort in knowing I did a critical alignment with the Mintlp, but might not be too happy, or confident seeing a good Cartridge sitting very cockeyed on the Headshell. Mark