I am currently adding a new menu item to a grids columnheader menu:

var currentHeaders=grid.headerCt.getMenu();

currentHeaders.add([{
text: 'new option',
menu : {
items: [
{
text: 'item 1', handler: function() {
}
}]
}}]);

this adds the new option to every column header menu - I would like to target a specific column and add the new menu option to just that one - is this possible ?