Flexlayout - vertical cards distribution with big spaces between

http://webix.com/snippet/31f1aabc
When output area is wide, then everything is ok.
When output area is tight, cards stacked vertical - seems ok, except sequence - “first card - big space - second card - big space”. What I want to see - “first card - little margin between cards - second card - very big space”.
How to do it?