Just18, I made a live usb using Sproggy's Joble edition (thanks, Sproggy!) and first added it to the existing entry on my usb, booted it up, and it worked fine.
Then I chose to overwrite everything, chose a different name (Joble), used persistence, copy to ram and memtest, and I'm writing from the live usb right now.
I'll keep on testing some other options and report if anything comes up.
Thanks for your work, Just18!
Torsten