Over the years during which Commodore sold tape drives, there have been a few different versions of the drive with different analog electronics. I'm interested in experimenting with "turbo" tape formats, but want to avoid writing anything which wouldn't work reliably on a wide range of drives.
Are there any documents which would describe things like the relationship between write-pulse widths and read-pulse timing uncertainty, or other such factors that would need to be tweaked to yield optimal performance?