Looks like i completely forgot about this forum! Shame on me!
So i went ahead and mounted the KW V1 for a Fiat 500 on my panda. And these are my findings:
-The Kit bolts right on to the panda, all the mounting places are exactly the same.
-The only thing that is NOT the same, is the break hose holder plate. The holder is about 2cm further outwards on the panda, giving your break hoses more clearance.
I drove around like that for about 6 months without problems, but eventually the the break hose broke. And thats pretty scary... So now i'm experimenting with some solutions.
So the moral of the story is: It will fit, no problem there, just DO NOT use the stock mounting holes for the break hoses. even using a ziptie or so will be better/safer.
Hope this helps, and gets rid of the confusion once and for all.