Last year I built a spinner but did a customer model as I have 4 different arm sizes out of the 12 arms. You put a pinwheel effect on it and it looks just fine. Now I have another spinner and used the spinner model on it. 1 string 25 arms and 10 nodes per. You put a pinwheel on it and its a mess. do circles with radial again a mess. Put on bars I would expect a pattern top to bottom nope it radiates from the center like circles should do. Now if I put the spinner in a group all by its self and apply the same effects to the group all look great just as I would expect it to. To me the spinner model is a flat matrix un-curved when the effects are applied. is this the way it should be