Alter Cluetip plugin to have consistent Y axis position relative to element, help with cluetip on block elements

Alter Cluetip plugin to have consistent Y axis position relative to element, help with cluetip on block elements

 Hi,

I'm trying to extend / alter the cluetip plugin so that it will behave more consistently on block  elements.  Currently if a cluetip is on a block element it will set both the x and y positions relative to the mouse.

This is OK on the X axis, so that the cluetip stays on the page, but I do not want this behavior on the Y axis.

The Use case is having a cluetip around a block anchor (around an image).

Has anyone had succes with this? I'm basically looking to have a fixed Y position relative to the anchor.