Update to my last post on slew speeds :
Using the EQ-5 Custom Pulley config, the Goto Rate multiplier usually appears as 808 in the config setup. When upgrading a Mega 2560 to 8.11 for the first time, opening the custom pulley config the correct multiplier appears. If microstep gear changing is then disabled, the multiplier changes to 507. re-enabling Gear Changing then sets the multiplier to 504. Loading the config file again brings 808 back. This does not happen on susequent config changes (i.e. once 8.11 has been written to the board).
Similarly, when downgrading from 8.11 to 8.05, the first timethe config file is loaded, the goto multiplier shows 101. Loadingthe config file a second time corrects it to 808. No other parameters change.
I also mentioned in an earlier post that upgrading took a very long time - this is because I was leaving my mouse pointer on the 'Next' button. It seems that after some operations, the button does not function until the pointer is clicked elsewhere on the screen then returned to the button. Maybe an issue with the touchpad on my laptop?
I should receive some 0.9 deg stepper motors this week, so will try 8.11 with TMC2100 driver boards.