Convert JU257 floppy for Amiga, HELP!!

[mrmkl]

Which version of JU257 drive are you going to use?

I think some of them will behave badly both in Amiga and in 1581, atleast with 1581 with WD1772 (contra WD1770)

The reason I think is track to track stepping times not being sufficient for some of the JU257 models.

[mrmkl]

I have made a note about one JU-257A427P rev. F.
I think the rw-head does not reach the correct track every time.
I also recall seeing a screenshot of Catweasel configuration utility, where head step pulses were adjusted for some drive, I think it was JU-257-something