Hello,
These are the options available when working with tabs (http://officeopenxml.com/WPtab.php):
* 'tabPositions' (array) each entry is an associative array with the following keys and values
* 'type' (string) can be clear, left (default), center, right, decimal, bar and num
* 'leader' (string) can be none (default), dot, hyphen, underscore, heavy and middleDot
* 'position' (int) given in twentieths of a point
There's no option to change the spacing between dots, only its type, leader and position.
Regards.