No, it is not done yet. I had problems with the four view and the cameras. The first try I did to align the four view ended in an unusable camera position, I had tilted the reference frame a bit so some modification would be a bit easier, but that way I lost the visual link to the reference image I use.
So I did the alignment again (I always store files under a new name, so I can go back to an older version). This time not making the error to tilt the reference frame, it all looked good. Until I noticed, that I had forgotten, that I already had created a raw extrusion for the paw. But that was not fully aligned with the reference image and so I aligned the reference frame with an artifact.
Ok, third try finally worked. The next step was to realign the cameras. They get moved with the reference frame, but as they were looking closely at details, three of the four cameras didn't even show the model. So I tried to find the model again and managed to crash the program. I am not sure why it happened, only when. It will probably very hard to find that bug. But I even managed to overcome that hurdle.
So I now have finally managed to align my cameras. I didn't think I would need some hours to do that (frustration doesn't exactly speed up doing those things). So now I only have to model that paw.