Modify toggleMenu animation config

Hi all,

I have a 2 menus (similar to Facebook, left and right) that slides in using toggleMenu(), like so:

Code:

Ext.Viewport.toggleMenu('left');

I'd like to add some config options to the animation itself, the only way I can see to override the animation is to use show(), but this breaks more than it fixes:

Code:

Ext.Viewport.getMenus().left.show({
    type: 'slide'
});

Using the above the menu comes in from the wrong side, and eventually breaks all together after toggling a few times.

Does anybody know how to modify the enter/exit animation? For now all I want to do is add easing to the slide.

Thanks is advance!

Modify toggleMenu animation config