Great plugin. There are 2 things that it needs though.
1- When using the center or classic layout, the throbber and the text on the same horizontal line cause the text to no longer be centered. The text needs to be offset by the size of the throbber in the direction of the throbber.
2 - The transform for the tip text and the throbber. Instead of having transform values, it should use set alignment and position. Then have an offset value if needed. This way we can move to any of the normal positions for a widget (Top, Bottom, Left, Right, Bottom Right, Top Right etc.)