3 revolutions, btw, is not acceptable for preservation of images, it needs to be a minimum of 5.
(Which, I presume, will push you to almost exactly 4 mins, the same as me)
It's ok, if your disks are perfect, but if not, 5 revolutions does make it easier to get a clean image.
I put together a few windows scripts, if you're a windows user, to make life a little easier.
https://github.com/M1kerochip/Launch...iveDirectories
And a front end,
https://github.com/M1kerochip/LaunchGreaseWeazle to help with dumping multiple disks, and making multiple dumps, and then running the above scripts.