Yes, Kickstart 1.3! The reason for that is that after a decade or three, I've grown unhappy with the way OS 2.0 and later are displaying OS 1.x icons.
I've actually been working on a tool to convert various older types of icons to NewIcons in a away that shows them how they are supposed to look, but more about that later.
So in order to see those old icons in all their glory, I not only needed to boot WB 1.x but also KS 1.x. So I got SKick do load an A500 KS 1.3. That worked fine, but of course my A1200 now behaved like an A500, so the only way to load software was from DF0.
I actually have an internal Gotek floppy emulator in my A3000, so for that machine this wouldn't have been such a huge issue, but for the A1200 this was actually a somewhat painful experience.
But the 1.x icons showed in all their glory and that was what the whole thing was all about.