Radial rotation of tiled clones

Hi, I am trying to rotate a simple drawing around the bottom point of that drawing. I've moved the + to the bottom point. However when I do the rotation it rotates the top of my drawing around that point. I tried moving the + to the top to see what happens. When I do this it still rotates the top of the drawing, but instead the rotated drawings do no intersect at all, they are offset around an imaginary circle. I can make the tutorial work, but not my drawing.