that's a nice idea too. However, do you think it would work in a nice way? if the column is filled with items then you thanks for the feedback! are hovering over an item and the column then you may go to drag but want to add an item and vice versa. i guess this could be tackled with correct behaviour in event listeners.

I'd be interested in any more input you have on this behaviour and the opinion of others on this approach.

thanks again for the feedback, it's much appreciated!