Answered WAYFINDER - create "more" menu item with collapsable menu items below that

I am trying to have a menu item named "MORE", and when the user clicks this, the menu unfolds to more menu items. Basically my menu has about 30 menu items.
On the first row about 10 menu items fit. The last menu item is "MORE". When "MORE" is clicked two additional rows open with the remainder of my menu items (= 20 items).
Please see attachment [a] and [b] for how it should look.

Is it possible to realise this? I tried creating a resource called "MORE", and have children underneath with the remainder menu items, but thats not ideal and I cannot get it the way I want as in the atachment image.

If you dont have it? this is old but invaluable. the complete guide to using wayfinder. It hasnt really changed and will help you immensely

https://dl.dropboxusercontent.com/u/14268583/The_almost_Complete_Guide_to_Constructing_Menus_in_MODx_Using_Wayfinder.pdf

Thank you, fourroses666, it worked brilliantly...:)

https://github.com/gijsroge/priority-navigation