It would appear the spokes are not coming away from the hub at the correct angle. As you have tried to correct this and have been prevented from doing so by the nipples, they are no good.
This is not the view of the forum, the owner, the moderators, or the members, but in my personal opinion I would mould something out of putty to put on my bike before fitting a Wassel part. That would include pistons, shells, cams and followers, carbs etc etc.
Cheap and nasty, ill fitting, not fit for purpose tat!
Just my personal opinion.