I wonder if the internal df0 is the same as in other Amiga models, or do i need a special drive?
Electronically, yes, it's the same. Physically, you will find most other Amiga internal floppies to be a bit smaller in height.
Over the years I had adopted a few different models (including an HD floppy) for use in Frankenthousand. It's pretty much a matter of drilling some different mounting holes in the brackets if you need to use a different model.
BTW, the stepper motors on the A1000 floppies had quite a problem with staying aligned. That's more than likely your problem.
Paul