[Big problem with customGridLines]

I was able to reproduce this.  The issue I had is with animation when no data value is zero along the Y axis.  If animation is turned on the custom grid line draws incorrectly (despite setting scale and attempting other workarounds).  The way to get around this is to render the grid completely and create it, then afterwards do a setTimeout with a delay of 1000 which sets the gridline.  The gridline will then render correctly.

[CustomGridLine and Date X Axis]

 Is there a way to create a vertical customgridline with an X-axis that displays dates? I am trying to show the cumulative number of items completed over time (with forcasted date for the future) and I would like to have a vertical line to show the current date.