This is my second entry to the 2nd Mandelbulb3d Teaser contest ... Our 'assignment' was to use the bulbox formula and 2 rotation formulas. I think I broke the rules on my first entry, as the order of the formulas didn't follow the rules. Oops! This piece uses _Rotate > _bulbox (Iterations 6) > _Rotate.
Good Luck!
Super entry!