The script has been updated to include an extra setting for "Grid Size". I realized that the grid became very big on small timeframes, and tiny on very large timeframes. I typically only look at 1 hour charts, so it was initially fine, but I realized this may be a nuissance for other people.
The "Grid Size" option will allow you to adjust the size of the rows used by the grid. Hope this helps.
If you have any additional ideas or suggestions, please let me know.