That is "correct" Plus4, also "faster". However, it didn't really work "faster" or "slower" but the written information is "more dense" or "less dense". Basically the "bit cells" are shorter or longer. This is a bit different, but the end result is more-or-less the same (just more reliable than actually changing the drive speed).
There is a reason why we have not provided a solution to write these images back to disk yet - and it is a simple one - they are copy protected!
It will take some effort to enable this, and even when we do - you are likely to have to buy/build some hardware to do it, because the Amiga itself cannot write (most of) them for obvious reasons.
We'll do it. Just when I do not know.
