Scan of Micro Peripherals Inc MPI 91/92 Product Manual Avail?

On Fri, 5 Oct 2018, Al Kossow via cctalk wrote: Interesting. http://www.mfarris.com/floppy/mpi.html shows 'M', 'S', and "M-S" suffixes. In OTHER brands, the Tandon TM100-4M was much like the TM100-4, except with 100TPI, instead of 96TPI. ("M for Micropolis compatible", and some of the TM100-4M drives did not have an 'M' on the nameplate!) (For those not familiar, Micropolis made a 100 TPI drive, and a few companies made provision for that.) But, what Micropolis features would be desirable in a 48TPI drive? And what was the difference between a 92M, a 92S, a 92M-002, and a 102M-S If it were "91"/"92"/"91M"/"92M", then that would seem comparable to the Tandon TM100-3/TM100-4/TM100-4M. And what is the 101/102, if not 100tpi versions of the 91/92? Course, thei all might be irrelevant if the differences were lead-screw (what my micropolis 48tpi had), V split band positioner, (like my MPI B51s, which were the only MPIs that I had) OR difference in OTHER specs such as for faster drives? (Lead screw tends to be slower than split-band) Was there ever any brand of drive where the alignment of the second side head was a DIFFERENT offset than the USUAL offset from the position of the first side head? Over the lifespan of 5.25" drives, there have been a few changes in some signals, such as READY, DiskChange, Density, etc. Even to the point that Tandy used pin 32 for fourth drive select, and then the drive manufacturers used it for side select.