Autotune_tmc -- Adjustment of parameters if 2 motors in parallel

[Sineos]

As a follow up: We have extended Stepper Motors in 3D Printing: Characteristics & Practical Guidelines in particular with the chapter 7. Wiring Stepper Motors in Series or Parallel

@DroneMang

I believe autotune_tmc is doing what one could do manually using this spreadsheet

Unfortunately, this is not the case at all.